local-cluster: Resolve Rust 1.88 clippy lints and format strings

[steviez]

Problem

Working towards #6850, broken out from #6854

Summary of Changes

• Run cargo clippy --fix --tests with Rust 1.88.0 set in rust-toolchain.toml
  • These should only be instances of uninlined_format_args
• Run cargo fmt with format_strings = true set in rustfmt.toml

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.2%. Comparing base (09fe49b) to head (2145159).
⚠️ Report is 2873 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7004   +/-   ##
=======================================
  Coverage    83.2%    83.2%           
=======================================
  Files         853      853           
  Lines      375393   375393           
=======================================
+ Hits       312474   312492   +18     
+ Misses      62919    62901   -18     

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[brooksprumo]