Move export package from internal to pkg

[marctc]

For Alloy component, we need to have access to access to tracing config
and Prometheus config. This PR moves packages from internal to pkg (public).

PR should be no-op.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.79%. Comparing base (1731edb) to head (0364c80).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1033      +/-   ##
==========================================
+ Coverage   79.06%   81.79%   +2.72%     
==========================================
  Files         137      137              
  Lines       10923    10923              
==========================================
+ Hits         8636     8934     +298     
+ Misses       1761     1488     -273     
+ Partials      526      501      -25     

Flag	Coverage Δ
integration-test	56.45% <ø> (?)
k8s-integration-test	59.12% <ø> (+0.07%)	⬆️
oats-test	37.33% <ø> (ø)
unittests	51.05% <ø> (ø)

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[grcevski]

LGTM!