enable Extension Telemetry Pipeline (out of preview)

[kevinclark19a]

Description

Move ETP out of preview and into prod.

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #2337 (623bc3c) into develop (bc8a373) will decrease coverage by 0.03%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop    #2337      +/-   ##
===========================================
- Coverage    70.90%   70.86%   -0.04%     
===========================================
  Files           97       97              
  Lines        14105    14105              
  Branches      2029     2029              
===========================================
- Hits         10001     9996       -5     
- Misses        3660     3662       +2     
- Partials       444      447       +3     

Impacted Files	Coverage Δ
azurelinuxagent/ga/exthandlers.py	86.24% <100.00%> (ø)
azurelinuxagent/ga/collect_telemetry_events.py	89.72% <0.00%> (-1.72%)	⬇️

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