…7354)

Use `MonoClass` getters in the rest of the code in `mono/metadata/`
1. Add `mono_class_contextbound_bit_offset()` which returns the bit offset of `MonoClass:contextbound` which is needed by `remoting.c`
2. Add `mono_class_create_array_fill_type` which is used by sgen to write over unused nursery fragments.
3. Alllow `metadata-cross-helpers.c` to access `MonoClass` fields directly. Rationale: it needs to compute field offsets.
4. Everything else shouldn't have any functional changes.

mono/mono#6925

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* [metadata] Fix warnings in class-accessors.c

Fix warnings about missing prototypes for class-abi-details.h functions.

* [cominterop] Use MonoClass getters in cominterop.c

* [loader] Use MonoClass getters in loader.c

* [runtime] Use MonoClass getters in icall.c

* [metadata] Add mono_class_contextbound_bit_offset() accessor

Compute the bit offset of MonoClass:countextbound

* [remoting] Use MonoClass getters for remoting.c

* [boehm] Use MonoClass getters in boehm-gc.c

* [callspec] Use MonoClass getters in callspec.c

* [sre] Use MonoClass getters in dynamic-image.c

* [w32] Use MonoClass getters in w32process.c

* [debug] Use MonoClass getters in mono-debug.c

* [runtime] Use MonoClass getters in method-builder.c

* [runtime] Use MonoClass getters in security-manager.c

* [coop] Use MonoClass getters in handle.c

* [reflection] Use MonoClass getters in reflection.c

* [sgen] Add mono_class_create_array_fill_type

Used by sgen to fill nursery fragments before a collection

* [sgen] Use MonoClass getters in sgen-mono.c and the GC bridges

* [verify] Use MonoClass getters in the verifier

* [sre] Use MonoClass getters in SRE

* [custom_attr] Use MonoClass getters in custom-attrs.c

* [metadata] Use MonoClass getters in gc.c

* [security-core-clr] Use MonoClass getters in security-core-clr.c

* [metadata] Use MonoClass getters in metadata.c

* [metadata] Allow metadata-cross-helpers to access MonoClass fields

* [coop handle] Use MonoClass getter in mono_handle_unbox_unsafe


Commit migrated from mono/mono@8ba4947