chore: Address lints introduced in rust 1.85.0 beta

[conradludgate]

With a new beta build of the rust compiler, it's good to check out the new lints. Either to find false positives, or find flaws in our code. Additionally, it helps reduce the effort required to update to 1.85 in 6 weeks.

[github-actions]

7293 tests run: 6929 passed, 0 failed, 364 skipped (full report)

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Flaky tests (3)

Postgres 17

• test_subscriber_synchronous_commit: release-x86-64

Postgres 15

• test_parallel_copy: release-arm64

Postgres 14

• test_parallel_copy: release-arm64

Code coverage* (full report)

• functions: 32.5% (8044 of 24738 functions)
• lines: 47.8% (66818 of 139844 lines)

* collected from Rust tests only

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_{The comment gets automatically updated with the latest test results
2804742 at 2025-01-10T11:36:21.481Z :recycle:}