winch: Gracefully handle unsupported Wasm types #9949
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Follow-up to #9851
Prior to this commit, Winch's ABI layer would panic on unsupported Wasm types, i.e.,
v128
,externref
.This commit ensures that a recoverable error is returned in case an unsupported type is found in a function signature.
This change is particularly helpful to start running spec tests for aarch64.