[otelcol] Add connectors to the components command

[evan-bradley]

Description:

Add connector components to the output of the components command.

Testing:

Unit tests

[dmitryax]

Approved too soon. PTAL at the test failures

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.05 🎉

Comparison is base (9104611) 90.97% compared to head (1b32428) 91.03%.

❗ Current head 1b32428 differs from pull request most recent head e7ccf85. Consider uploading reports for the commit e7ccf85 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7809      +/-   ##
==========================================
+ Coverage   90.97%   91.03%   +0.05%     
==========================================
  Files         295      295              
  Lines       14535    14538       +3     
==========================================
+ Hits        13223    13234      +11     
+ Misses       1048     1042       -6     
+ Partials      264      262       -2     

Impacted Files	Coverage Δ
otelcol/command_components.go	90.32% <100.00%> (+1.03%)	⬆️

... and 1 file with indirect coverage changes

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