Remove more domain code (#49047)

Remove more domain code (#49047)

* Remove mono_domain_ambient_memory_manager (), add mono_mem_manager_get_ambient () instead to get rid of a few domain references.

* Remove 'domain' argument from mono_thread_create_internal ().

* Remove domains from the metadata update code.

* Remove unused domain->env hash table. Also remove unused MONO_DOMAIN_FIRST_GC_TRACKED/LAST_GC_TRACKED.

* Remove more unused fields from MonoDomain.

* Remove context static field support.

* Move more fields out of MonoDomain.

* Move jit info tables out of MonoDomain.

* Move jit_code_hash from MonoDomain to MonoJitMemoryManager.

* Move special_static_fields from MonoDomain to MonoMemoryManager.

* Move entry_assembly to runtime.c, add accessors.