Helm Chart 1.3.0 with Beyla 1.7.0

[mariomac]

This PR also reverts this PR #961

The idea behind having a default open Prometheus port was to allow a real single-command installation of Beyla without any kind of configuration. Just having a Beyla working with defaults.

You can have without problem this:

    prometheus_export:
      port: 9090
      path: /metrics
    internal_metrics:
      prometheus:
        port: 9090
        path: /metrics

or even:

    prometheus_export:
      port: 9090
      path: /metrics
    internal_metrics:
      prometheus:
        port: 9090
        path: /internal/metrics

As the Beyla prometheus manager is smart enough to detect when both exporters go to the same port and path, and redirect there all the metrics.

I'm not sure if we really want to enable internal metrics by default to our users. It seems that, in the original code, what was wrong was the comment saying this was internal metrics, but not the fact of being exporting prometheus metrics by default.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.99%. Comparing base (f88413a) to head (b5c51d3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1078      +/-   ##
==========================================
+ Coverage   81.90%   81.99%   +0.08%     
==========================================
  Files         139      139              
  Lines       11329    11329              
==========================================
+ Hits         9279     9289      +10     
+ Misses       1534     1528       -6     
+ Partials      516      512       -4     

Flag	Coverage Δ
integration-test	57.19% <ø> (+0.27%)	⬆️
k8s-integration-test	59.42% <ø> (+0.09%)	⬆️
oats-test	36.90% <ø> (-0.02%)	⬇️
unittests	51.93% <ø> (ø)

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