msrv patch for tokio-stream, and other lint changes

[lalitb]

Changes

• Picked lint error from Fix clippy lint messages #2083.
• Patching till we decide to bump msrv for opentelemetry-sdk, opentelemetry-http to v1.70

Error: https://github.com/open-telemetry/opentelemetry-rust/actions/runs/10751933526/job/29819701086?pr=2083

  Downloaded linux-raw-sys v0.4.14
error: package `tokio-stream v0.1.16` cannot be built because it requires rustc 1.70 or newer, while the currently active rustc version is 1.65.0
Either upgrade to rustc 1.70 or newer, or use
cargo update -p [email protected] --precise ver
where `ver` is the latest version of `tokio-stream` supporting rustc 1.65.0
Error: Process completed with exit code 101.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 77.9%. Comparing base (a50e3ff) to head (b1858d6).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2086   +/-   ##
=====================================
  Coverage   77.8%   77.9%           
=====================================
  Files        121     121           
  Lines      20970   20969    -1     
=====================================
  Hits       16335   16335           
+ Misses      4635    4634    -1     

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[lalitb]

Waiting for #2083 to be incorporated with these changes, as both should go together,