Rust: Update some inline expectation comments

[hvitved]

#18847 follow-up.

[Copilot]

PR Overview

This PR updates inline expectation comments in Rust library tests to correct and improve consistency based on the follow-up from PR #18847.

• Updated inline expectation comments from the "$ MISSING: item=…" format to the expected "$ item=…" format
• Adjusted several annotation comments in test cases to ensure they align with the established patterns

Reviewed Changes

File	Description
rust/ql/test/library-tests/path-resolution/main.rs	Updated inline expectation comments for improved consistency and accuracy

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (1)

rust/ql/test/library-tests/path-resolution/main.rs:184

• [nitpick] The inline expectation comment here is inconsistent with surrounding entries; consider updating '52' to 'I52' for uniformity with other expectation items.

> // $ MISSING: item=52

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[redsun82]

nice!