Remove tracing::instrument from apply_debug_overrides

[kazk]

Motivation

When logs are configured with span events, for example:

tracing_subscriber::fmt()
    .with_max_level(Level::INFO)
    .with_span_events(FmtSpan::CLOSE)
    .finish();

A warning is always logged in Config::infer() because apply_debug_overrides is always called, and has #[tracing::instrument(level = "warn")].

Solution

Remove #[tracing::instrument(level = "warn")] because I'm not sure how this span is useful.

Alternate Solution

Only call apply_debug_overrides when overrides are defined.

Or add skip(self) (#[tracing::instrument(level = "warn", skip(self))]) to minimize output.

[codecov-commenter]

Codecov Report

Merging #958 (285a310) into master (1c34bf6) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #958      +/-   ##
==========================================
- Coverage   72.46%   72.43%   -0.03%     
==========================================
  Files          64       64              
  Lines        4412     4412              
==========================================
- Hits         3197     3196       -1     
- Misses       1215     1216       +1     

Impacted Files	Coverage Δ
kube-client/src/config/mod.rs	50.00% <ø> (ø)
kube-runtime/src/wait.rs	69.81% <0.00%> (-1.89%)	⬇️

[clux]

The deny error has a fix in the resource scope pr, feel free to cherry pick that in.