[stack-switching] Support the resume_throw_ref instruction
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This patch adds support for the `resume_throw_ref` instruction, which is similar to the `resume_throw` instruction, but rather than injecting a fresh exception into the continuation, the `resume_throw_ref` instruction injects an exception reference into the continuation. Note: the new instruction is, at the time of writing, assigned the opcode `0xE5` conflicting with the `switch` instruction, which has been assigned `0xE6` as its opcode instead (c.f. [the work-in-progress specification](https://github.com/WebAssembly/stack-switching/blob/main/proposals/stack-switching/Explainer.md#binary-format)).
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This patch adds support for the
resume_throw_refinstruction, which is similar to theresume_throwinstruction, but rather than injecting a fresh exception into the continuation, theresume_throw_refinstruction injects an exception reference into the continuation.Note: the new instruction is, at the time of writing, assigned the opcode
0xE5conflicting with theswitchinstruction, which has been assigned0xE6as its opcode instead (c.f. the work-in-progress specification).