Categorize flaky/random fails in CI

Currently in is unclear if a flakiness is due to "bad test case" or "inconsistent CI system". Categorizing would help identifying the improvement actions. Categorization would also make the follow-up easier, to see if improvement actions made any differences.

Known reasons for a fail:

• test fails
• test fails because of test specific timeout
• test crashes
• test execution is stopped because no output in the log for 15 minutes
• VM appears to be frozen
• max test execution timeout reaches (max VM lifetime)

example of crashes:

https://testresults.qt.io/coin/api/log/qt/qtwebengine/30969ebdf0b030d2f34f3f405497211315510fab/MacOSMacOS_13arm64MacOSMacOS_13arm64Clangqtci-macos-13-arm64Sccache_TestOnly/99104407198c599dae20bfda131d512a61052790/forceRun/test_1690141264/log.txt.gz
(not stored in in influx)