Regression: QtCreator crashes while scanning for tests

While scanning tests, *QtCreator crashes* in this file: `src/plugins/autotest/gtest/gtestvisitors.cpp` at this line:
```
const CPlusPlus::Argument *testCaseNameArg = ast->symbol->argumentAt(1)->asArgument();
```
Debugger says that:

• `ast->symbol->argumentAt(1)` is `0x0`.
• and `ast->symbol->argumentCount()` is 1.

It crashes on this [chromium test](https://source.chromium.org/chromium/chromium/src/+/main:media/gpu/vaapi/vp9_temporal_layers_unittest.cc;l=104?q=media%2Fgpu%2Fvaapi%2Fvp9_temporal_layers_unittest.cc&ss=chromium%2Fchromium%2Fsrc):

```
TEST_P(VP9TemporalLayersTest, )
const size_t num_temporal_layers = GetParam();
VP9TemporalLayers temporal_layers(num_temporal_layers);
EXPECT_EQ(temporal_layers.num_layers(), num_temporal_layers);
```

It looks like regression was introduced in 5d5ff574953822043619c23f9b251016ac3357fe, specifically, this check was removed: ` || ast->symbol->argumentCount() != 2`

Backtrace:
```
1 Autotest::Internal::GTestVisitor::visit gtestvisitors.cpp 98 0x7f45853b1a67
2 CPlusPlus::FunctionDefinitionAST::accept0 ASTVisit.cpp 495 0x7f458749e57c
3 CPlusPlus::AST::accept AST.cpp 51 0x7f458746e658
4 CPlusPlus::AST::accept AST.h 135 0x7f45874a1679
5 CPlusPlus::AST::accept<CPlusPlus::DeclarationAST *> AST.h 141 0x7f45874a198f
6 CPlusPlus::LinkageBodyAST::accept0 ASTVisit.cpp 567 0x7f458749ea0f
7 CPlusPlus::AST::accept AST.cpp 51 0x7f458746e658
8 CPlusPlus::AST::accept AST.h 135 0x7f45874a1679
9 CPlusPlus::NamespaceAST::accept0 ASTVisit.cpp 657 0x7f458749ef1e
10 CPlusPlus::AST::accept AST.cpp 51 0x7f458746e658
11 CPlusPlus::AST::accept AST.h 135 0x7f45874a1679
12 CPlusPlus::AST::accept<CPlusPlus::DeclarationAST *> AST.h 141 0x7f45874a198f
13 CPlusPlus::TranslationUnitAST::accept0 ASTVisit.cpp 960 0x7f45874a001f
14 CPlusPlus::AST::accept AST.cpp 51 0x7f458746e658
15 CPlusPlus::AST::accept AST.h 135 0x7f45874a1679
16 CPlusPlus::ASTVisitor::accept ASTVisitor.cpp 36 0x7f45874a1db3
17 Autotest::Internal::GTestParser::processDocument gtestparser.cpp 104 0x7f45853a2a3a
18 Autotest::Internal::parseFileForTests testcodeparser.cpp 291 0x7f45853fb878
19 Autotest::Internal::TestCodeParser::<lambda(QFutureInterface<QSharedPointer<Autotest::TestParseResult>>&, const QString&)>::operator()(QFutureInterface<QSharedPointer<Autotest::TestParseResult>> &, const QString &) const testcodeparser.cpp 364 0x7f45853fb9ac
20 Utils::Internal::runAsyncQFutureInterfaceDispatch<QSharedPointer<Autotest::TestParseResult>, const Autotest::Internal::TestCodeParser::scanForTests(const QStringList&, const QList<Autotest::ITestParser *>&)::<lambda(QFutureInterface<QSharedPointer<Autotest::TestParseResult>>&, const QString&)>&, std::reference_wrapper<QString>>(std::true_type, QFutureInterface<QSharedPointer<Autotest::TestParseResult>>, const Autotest::Internal::TestCodeParser::<lambda(QFutureInterface<QSharedPointer<Autotest::TestParseResult>>&, const QString&)> &) runextensions.h 257 0x7f4585403fd6
... <More>
```
Variables:

	Locals		
		ast	@0x7fdfd8040b78	CPlusPlus::FunctionDefinitionAST
			[CPlusPlus::DeclarationAST]	@0x7fdfd8040b78	CPlusPlus::DeclarationAST
			ctor_initializer	0x0	CPlusPlus::CtorInitializerAST*
			decl_specifier_list	0x0	CPlusPlus::SpecifierListAST*
			declarator	@0x7fdfd80409b0	CPlusPlus::DeclaratorAST
			function_body	@0x7fdfd8040bb0	CPlusPlus::CompoundStatementAST
			qt_invokable_token	0	int
			symbol	@0x7fdfd803db60	CPlusPlus::Function
				[CPlusPlus::Scope]	@0x7fdfd803db60	CPlusPlus::Scope
					[CPlusPlus::Symbol]	"TEST_P"	CPlusPlus::Symbol
						[vptr]	_vptr.Symbol	 
						_name	"TEST_P"	CPlusPlus::Identifier
						_enclosingScope	@0x7fdfd8101ed0	CPlusPlus::Namespace
						_next	0x0	CPlusPlus::Symbol*
						_fileId	"/home/dimanne/devel/chromium/src/media/gpu/vaapi/vp9_temporal_layers_unittest.cc"	CPlusPlus::StringLiteral
						_sourceLocation	458	int
						_hashCode	92965440	unsigned int
						_storage	0	int
						_visibility	0	int
						_index	3	int
						_line	104	int
						_column	1	int
						_isGenerated	0	bool : 1
						_isDeprecated	0	bool : 1
						_isUnavailable	0	bool : 1
					_endOffset	4576	int
					_members	@0x7fdfd819e4f0	CPlusPlus::SymbolTable
						_allocatedSymbols	4	int
						_hash	@0x7fdfd80dca60	CPlusPlus::Block
							[CPlusPlus::Scope]	@0x7fdfd83342a0	CPlusPlus::Scope
						_hashSize	4	int
						_owner	@0x7fdfd803db60	CPlusPlus::Function
							[CPlusPlus::Scope]	@0x7fdfd803db60	CPlusPlus::Scope
							[CPlusPlus::Type]	@0x7fdfd803dbb8	CPlusPlus::Type
							#1	@0x7fdfd803dbd8	union {...}
							_exceptionSpecification	0x0	CPlusPlus::StringLiteral*
							_returnType	@0x7fdfd803dbc0	CPlusPlus::FullySpecifiedType
						_symbolCount	1	int
						_symbols	@0x7fdfd80ab3f0	CPlusPlus::Argument
							[CPlusPlus::Symbol]	"<null>"	CPlusPlus::Symbol
							_initializer	0x0	CPlusPlus::StringLiteral*
							_type	"VP9TemporalLayersTest"	CPlusPlus::FullySpecifiedType
					_startOffset	3371	int
				[CPlusPlus::Type]	@0x7fdfd803dbb8	CPlusPlus::Type
					[vptr]	_vptr.Type	 
				#1	@0x7fdfd803dbd8	union {...}
				_exceptionSpecification	0x0	CPlusPlus::StringLiteral*
				_returnType	@0x7fdfd803dbc0	CPlusPlus::FullySpecifiedType
					_type	@0x7fe264da63b8	CPlusPlus::UndefinedType
						[CPlusPlus::Type]	@0x7fe264da63b8	CPlusPlus::Type
					#1	@0x7fdfd803dbc8	union {...}
						_flags	0	unsigned int
						f	@0x7fdfd803dbc8	CPlusPlus::FullySpecifiedType::Flags
		column	1689892470	int
		disabled	127	bool
		disabledCase	18	bool
		disabledPrefix	"DISABLED_"	QString
		id	@0x7fdfd8040998	CPlusPlus::DeclaratorIdAST
		line	32738	int
		locationAndType	@0x7fe2127fb810	Autotest::Internal::GTestCodeLocationAndType
		namespaces	"media::"	QString
		prettyName	"TEST_P"	QString
		spec	@0x7fe2127fb7f0	Autotest::Internal::GTestCaseSpec
		testCaseName	""	QString
		testCaseNameArg	@0x7fe2127fb7e0	CPlusPlus::Argument
		testSuiteName	""	QString
		testSuiteNameArg	@0x7fdfd81aa4b0	CPlusPlus::Argument
		this	@0x7fe2127fbb10	Autotest::Internal::GTestVisitor
		token	32738	unsigned int
	Inspector		
	Expressions		
	Return Value		
	Tooltip		

Logs:
```
qtc.cpptools.indexer: Indexing 108998 of 108999 : "/home/dimanne/devel/chromium/src/out/IDE/gen/third_party/blink/public/mojom/background_fetch/background_fetch.mojom-test-utils.h"
qtc.cpptools.indexer: Indexing 108999 of 108999 : "/home/dimanne/devel/chromium/src/third_party/webrtc/modules/audio_coding/neteq/buffer_level_filter.h"
qtc.cpptools.indexer: Indexing finished.
qtc.autotest.testcodeparser: setState( 0 ), currentState: 0
qtc.autotest.testcodeparser: adding singleShot
qtc.autotest.testcodeparser: calling scanForTests (updateTestTree)
qtc.autotest.testcodeparser: setting state to FullParse (scanForTests)
qtc.autotest.testcodeparser: "21:34:22.065" StartParsing
```