CP: Do not create placeholder status file for AKS extensions (#2298)

[larohra]

Description

Issue #

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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 #2328 (b679128) into develop (669105d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop    #2328   +/-   ##
========================================
  Coverage    70.76%   70.77%           
========================================
  Files           97       97           
  Lines        14031    14035    +4     
  Branches      2011     2012    +1     
========================================
+ Hits          9929     9933    +4     
  Misses        3658     3658           
  Partials       444      444           

Impacted Files	Coverage Δ
azurelinuxagent/ga/exthandlers.py	86.23% <100.00%> (+0.04%)	⬆️

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