[PerfView][Pinned Object Heap] Add support for Pinned Object Heap data in ETW events

[VSadov]

Once dotnet/runtime#34549 is merged, GC will start reporting additional information regarding Pinned Object Heap.

The new data is added in a backwards compatible way, so the change is not breaking.

However to fully support ingestion of the new data, PerfView needs to add support for additional fields. (see: dotnet/runtime#34549 for details)

[brianrob]

@VSadov, thanks for filing this issue. Are you planning to submit a PR as part of this effort?

[VSadov]

Yes, you can assign this to me.

[tommcdon]

@VSadov @davmason can this issue be closed or is there work left in tracevent/perfview to support this?

[davmason]

@brianrob added POH support in the most recent version of perfview, closing