fix: update runtime wasm tests

[mattjohnsonpint]

Description

The language-specific tests in the runtime rely on pre-built wasm files, which haven't been updated recently. Upon update I found and fixed a few issues:

• The change made in fix: unused imports should not be included in metadata #657 was filtering slices needed for map subtypes
• The runtime was missing a return statement in the case of an invalid execution plan error
• The host functions used in the tests needed a modus_ prefix in the module name, to be picked up by the extractor in the Modus Go SDK
• Go no longer allows int in wasm imports, so host functions need to use int32 (or int64)

I also added some more VS Code debug profiles to troubleshoot test app build failures.

Checklist

• Code compiles correctly and linting passes locally
• For all code changes, an entry added to the CHANGELOG.md file describing and linking to this PR
• Tests added for new functionality, or regression tests for bug fixes added as applicable