[gitlab] update rc deployment environments (#1679)

[celenechang]

What does this PR do?

Cherry-pick #1679

Motivation

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Additional Notes

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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

Describe your test plan

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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 48.87%. Comparing base (65ac5f0) to head (1454f18).

Additional details and impacted files

@@           Coverage Diff           @@
##            v1.12    #1680   +/-   ##
=======================================
  Coverage   48.87%   48.87%           
=======================================
  Files         235      235           
  Lines       21143    21143           
=======================================
  Hits        10333    10333           
  Misses      10269    10269           
  Partials      541      541           

Flag	Coverage Δ
unittests	48.87% <ø> (ø)

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