Implement the eqref type and ref.eq and related operations. Eqref is the supertype of all types that support reference equality, which includes i31ref, structs, and arrays.
<rdar://problem/102170048>
Pull request: https://github.com/WebKit/WebKit/pull/11396
Committed 261663@main (0fe8046298bf): <https://commits.webkit.org/261663@main> Reviewed commits have been landed. Closing PR #11396 and removing active labels.