Moving here the code from beyla-k8s-meta repository

[mariomac]

Moved here the code from this repo:
https://github.com/grafana/beyla-k8s-cache

In another PR, we will move the image publication scripts here too.

Then, the other repository will be archived or deleted.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.35955% with 78 lines in your changes missing coverage. Please review.

Project coverage is 71.15%. Comparing base (c2f7c8f) to head (a991cd1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/kubecache/service/service.go	0.00%	42 Missing ⚠️
cmd/k8s-cache/main.go	0.00%	29 Missing ⚠️
pkg/kubecache/meta/informers_init.go	50.00%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1278       +/-   ##
===========================================
+ Coverage   60.75%   71.15%   +10.39%     
===========================================
  Files         132      139        +7     
  Lines       13594    14049      +455     
===========================================
+ Hits         8259     9996     +1737     
+ Misses       4736     3396     -1340     
- Partials      599      657       +58     

Flag	Coverage Δ
integration-test	59.27% <27.77%> (-1.49%)	⬇️
k8s-integration-test	57.61% <8.98%> (?)
oats-test	35.25% <0.00%> (?)

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[grcevski]

LGTM!