Clippy fixes 2026 q1

[clux]

Makes CI green without changing anything.

Generated fix via clippy + an #[allow] directive.

I think the large enum variants in errors could be worth looking at in the long run, there is an alternate in #1880 but it might be a breaking change, and not super keen on that.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.9%. Comparing base (abd316b) to head (11b924d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
kube-client/src/api/portforward.rs	0.0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1881     +/-   ##
=======================================
- Coverage   75.9%   75.9%   -0.0%     
=======================================
  Files         85      85             
  Lines       8237    8237             
=======================================
- Hits        6248    6247      -1     
- Misses      1989    1990      +1     

Files with missing lines	Coverage Δ
kube-runtime/src/controller/mod.rs	31.6% <ø> (ø)
kube-client/src/api/portforward.rs	0.0% <0.0%> (ø)

... and 3 files with indirect coverage changes

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