Mirror changes from mono/corefx,coreclr (#17777)

Mirror changes from mono/corefx,coreclr (#17777)

* Rewrite the rest of the array non-generic fast paths in C# (#27703)

* Rewrite the rest of the array non-generic fast paths in C#

* Add missing resource string

* Use CorElementType and handle native ints to match the unmanaged implementation

* Avoid try pattern for Sort and Reverse

* Match the native implementation more closely

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
* Rewrite Enum.CompareTo in C# (dotnet/coreclr#27792)

* Rewrite Enum.CompareTo in C#

* Handle floating point too for match the existing native implementation

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
* Remove unused argument from GetRegionDisplayName (dotnet/coreclr#27806)

* Remove unused argument from GetRegionDisplayName

* Address race conditions in CultureData

While most of the race conditions in this file are benign, in these cases, a thread could end up returning an intermediate value due to multiple potential writes to the same field.

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
* Fix StyleCop rule SA1129 ("Do not use default value type constructor") (#27716)

Will enable the rule in corefx once these changes have propagated.

Signed-off-by: dotnet-bot <dotnet-bot@microsoft.com>
* Remove non-shared Enum.CompareTo/InternalCompareTo implementation, add new Array icalls used by shared code