Add more runtime GC counters (dotnet/coreclr#24561)

Add more runtime GC counters (dotnet/coreclr#24561)

* Add Series/CounterType to CounterPayload and IncrementingCounterPayload

* merging with master

* Add Generation sizes counter

* Some cleanup

* Add allocation rate counter

* Fix build

* add Allocation Rate runtime counter

* Fix a potential div by zero exception

* Add back in code commented out

* Add LOH size counter

* Fix linux build

* GetTotalAllocated -> GetTotalAllocation

* PR feedback

* More cleanup + renaming per PR feedback

* undo comments

* more pr feedback

* Use existing GC.GetTotalAllocatedBytes API instead

* Remove duplicate GetTotalAllocation

* More PR feedback

* Fix x86 build

* Match type between C++/C#

* remove unused variables'

Commit migrated from https://github.com/dotnet/coreclr/commit/b676246c1dd880b7290a1313cdac309fe020aa6f