add units for control plane metrics

[chadpatel]

Description of the issue

Enhanced container insights control plane metrics do not have units.

Description of changes

The prometheus receiver that ingests these metrics does not assign them units. We can add units by correctly configuring the EMF exporter

License

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

Tests

Requirements

Before commit the code, please do the following steps.

1. Run make fmt and make fmt-sh
2. Run make lint

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.01%. Comparing base (96d4763) to head (dba299f).
⚠️ Report is 974 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #824      +/-   ##
==========================================
+ Coverage   57.58%   60.01%   +2.42%     
==========================================
  Files         370      351      -19     
  Lines       17548    17933     +385     
==========================================
+ Hits        10105    10762     +657     
+ Misses       6848     6596     -252     
+ Partials      595      575      -20     

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