Fix EventSource trimmer warning (#51237)

Fix EventSource trimmer warning (#51237)

* eh fix

* test change that inadvertently got checked in earlier

* Suppresses the trimmer warning on TypeAnalysis ctor

* Incorporating FB

* Update src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/DiagnosticSourceEventSource.cs

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/System.Diagnostics.DiagnosticSource/src/System/Diagnostics/DiagnosticSourceEventSource.cs

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Update src/libraries/System.Private.CoreLib/src/System/Diagnostics/Tracing/EventSource.cs

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>
* Fix DynamicDependency as per PR feedback

* an earlier change got reverted

* fixed proj file netcore app condition check

* fixed NETCORE_ENGINEERING_TELEMETRY build failures

* fixeing another NETCORE_ENGINEERING_TELEMETRY build failures

* Adding RequiresUnreferencedCode to TypeAnalysis ctor instead of suppressing the warning to get FB, not fully fixed

* PR FB and suppressing warnings for safe calls

* propagated the warning all the way up

* CI build break fix for one file

* excluding NativeRTEventSrc from being build in a project

* Missed couple of supppressions on NativeRTEventSrc

* build break fixes

* Trimmer warning fix related to EventSource manifest creation

* incorporate fb

* fix build break in some configs

* comment feedback

* build break

Co-authored-by: Eric Erhardt <eric.erhardt@microsoft.com>