[thread-safety] - Toolset

Brief

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

Areas

Toolset.cs

[JanProvaznik]

Note: the memory statistics collection strategy for telemetry in TaskFactoryWrapper stops working with in proc nodes.
For net core there are apis to count memory per thread but not for framework