Restoring disabled informers in beyla-k8s-cache

[mariomac]

Restoring the configuration of disabled informers, after updating them to the new cache library (please see vendor changes for more insights).

For Beyla 2.0, we might consider to remove this configuration feature in favor of just externalizing the load to https:/grafana/beyla-k8s-cache (less configuration options to implement, document and support).

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 42.30769% with 15 lines in your changes missing coverage. Please review.

Project coverage is 79.44%. Comparing base (233fd32) to head (8b0ed90).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/internal/kube/informer_provider.go	42.30%	14 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1264      +/-   ##
==========================================
- Coverage   81.76%   79.44%   -2.33%     
==========================================
  Files         131      131              
  Lines       11041    11051      +10     
==========================================
- Hits         9028     8779     -249     
- Misses       1502     1748     +246     
- Partials      511      524      +13     

Flag	Coverage Δ
integration-test	62.13% <38.46%> (-0.02%)	⬇️
k8s-integration-test	?
oats-test	37.11% <7.69%> (-0.07%)	⬇️
unittests	53.85% <11.53%> (-0.09%)	⬇️

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[grcevski]

LGTM!