Let Qt Creator automatically pick up Ninja from SDK

When installing the SDK, the user should be able to use both CMake and the recommended ninja tool without further configuration necessary. This should help new users getting a seemless first-time experience, but also help existing users into using the recommended Ninja backend.

This requires that

• CMake and ninja tools in the sdk are automatically installed by default (see QTBUG-82466)
• Creator does need to automatically use the installed Ninja by default, instead of Make/jom