Port EventPipe CoreCLR changes to Mono. (#41152)

Port EventPipe CoreCLR changes to Mono. (#41152)

* [MonoVM] Enable startup events over EventPipe.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/36720.

* [MonoVM] Add the ability for profilers to listen to EventPipe events.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/37002.

* [MonoVM] Add ProcessInfo command to Diagnostics Server.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/38967.

* [MonoVM] Unregister callback when setting a provider for deferred delete.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/40191.

* [MonoVM] Generational aware analysis based on environment variable.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/40332.

NOTE, the ability to pause a session was not ported since it
currently have no use in Mono and looks like a temporary
solution in CoreCLR.

* [MonoVM] Rebrand Diagnostics Server to DiagnosticPort.

Mono port of CoreCLR PR: https://github.com/dotnet/runtime/pull/40499.