fix: rust 1.58.0 warnings and update protos

[TommyCpp]

• Fix new clippy warnings comes with rust 1.58.0.
• Update proto-generated files.

[codecov]

Codecov Report

Merging #707 (3da84dd) into main (605d6c0) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #707      +/-   ##
==========================================
- Coverage   71.39%   71.36%   -0.03%     
==========================================
  Files         101      101              
  Lines        8564     8557       -7     
==========================================
- Hits         6114     6107       -7     
  Misses       2450     2450              

Impacted Files	Coverage Δ
opentelemetry-dynatrace/src/transform/metrics.rs	83.33% <100.00%> (-0.17%)	⬇️

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