Improve the performance of Environment.WorkingSet in Windows (#26522)
* Use win32 api directly for workingset counter
* Fix build warnings
* Removing useless code
* more cleanup
* remove size annotation
* remove useless comment
* Move all the changes to Environment.WorkingSet and remove it from RuntimeEventSourceHelper
* removing useless usings
* Use kernel32.dll instead of psapi.dll
* Code review feedback
* Remove newline change
* More code review nits
Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>