[gitlab] update nightly operator deployment job

[celenechang]

What does this PR do?

Update Gitlab jobs to trigger operator nightly workflow publication
Update conductor configuration to trigger deployment upon successful publication

Motivation

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Additional Notes

Anything else we should know when reviewing?

Minimum Agent Versions

Are there minimum versions of the Datadog Agent and/or Cluster Agent required?

• Agent: vX.Y.Z
• Cluster Agent: vX.Y.Z

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Checklist

• PR has at least one valid label: bug, enhancement, refactoring, documentation, tooling, and/or dependencies
• PR has a milestone or the qa/skip-qa label

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.19%. Comparing base (204ff10) to head (a8e3a86).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1311   +/-   ##
=======================================
  Coverage   55.19%   55.19%           
=======================================
  Files         247      247           
  Lines       28390    28390           
=======================================
  Hits        15671    15671           
  Misses      11833    11833           
  Partials      886      886           

Flag	Coverage Δ
unittests	55.19% <ø> (ø)

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