[move][move-2024][enums] Fix a small issue when match is malformed

[cgswords]

Description

This fixes a bug that was previously a compiler crash when a match was malformed and counterexample generation occurred. This was due to some changes for parser resilience combined with moving match analysis to typing.

Test plan

Added the repro test, and it now produces the error as expected.

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Release notes

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• [ ] Indexer:
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• [ ] Rust SDK:

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