[Interpreter] Static constructors and field access (#8370)

* Add support for ldfld and stfld (#5011)

* Make interpreter methods take an concrete *Desc types

* Update load and store field methods to handle specific types (5011)

* Add support for static fields belonging to dynamically loaded types

* Add support for loading and storing fields in native metadata

* Use byte arrays to represent statics bases

* Add support for static constructors

* Include module name in key identity check

* Ensure static class constructor is run for native format types

* Retrieve non gc statics from typeloader environment

* Allocate memory for non gc statics (#5011)

* Add support for dynamic static constructors in runtime (#5011)

* Ensure static constructors of compiled in types are run (#5011)

* Use RuntimeTypeHandle when type is in native binary (#5011)

* Simplify static field load/store methods (#5011)

* Add support for gc statics of dynamic types (#5011)

* Fix static field get/set for pre-compiled in types

* Add TryGetThreadStaticFieldDataDirect method

* Remove StaticsRegion class

* Use state.GcDataSize to calculate eetype base size

* Improve support for gc statics

* s/GetHasCode/GetHashCode

* Improve code comments

* Clean up thread static support code