chore: udapte Rust toolchain to 2024-10-19

[v0y4g3r]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

This PR updates project toolchain to nightly-2024-10-19, and fixes some clippy/UT errors.

Checklist

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.

[v0y4g3r]

The failing CI is because of a rustc bug: rust-lang/rust#131190

[codecov]

Codecov Report

Attention: Patch coverage is 91.42857% with 3 lines in your changes missing coverage. Please review.

Project coverage is 83.92%. Comparing base (2ee1ce2) to head (2501104).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4857      +/-   ##
==========================================
- Coverage   84.26%   83.92%   -0.34%     
==========================================
  Files        1129     1135       +6     
  Lines      208371   208462      +91     
==========================================
- Hits       175575   174962     -613     
- Misses      32796    33500     +704     

[waynexia]

BTW we need to confirm this toolchain works in other targets / OSs

[evenyag]

BTW we need to confirm this toolchain works in other targets / OSs

Let's have a try:
https://github.com/GreptimeTeam/greptimedb/actions/runs/11476544372
https://github.com/GreptimeTeam/greptimedb/actions/runs/11480019511

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