[IRGen] Canonicalize associated type witnesses. #28869
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Associated type witnesses were not getting canonicalized with respect to their appropriate generic signatures, causing types to be emitted into the metadata that could not be properly demangled. Be consistent about providing a generic signature for canonicalization. Fixes SR-11642 / rdar://problem/56466693.
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Associated type witnesses were not getting canonicalized with respect to
their appropriate generic signatures, causing types to be emitted into
the metadata that could not be properly demangled. Be consistent about
providing a generic signature for canonicalization.
Fixes SR-11642 / rdar://problem/56466693.