Brief

Fix thread safety issues for the following classes, for the upcoming multi-threaded support.
Check parent issue for more details.
Depends on #11916

Use Copilot to find and identify more issues other than the existing classes .

Areas

• List and identify and find issues with other classes with copilot
• Follow-up the potential fixes with the team (at least try to fix 2 classes)
• (If more than 2 classes): Create more sub items under Fix thread-safety issues in MSBuild classes with upcoming multi-threaded node support #11937

Except:

• BuildRequestEntry.cs
• TaskExecutionHost.cs
• Toolset.cs
• TaskFactoryWrapper.cs
• TaskRegistry.cs
• TypeLoader.cs
• NodeProviderOutOfProcTaskHost.cs