Omnistaging is globally off by default

[paul0403]

Context:
In tandem with catalyst PR PennyLaneAI/catalyst#2987

Description of the Change:

Benefits:

Possible Drawbacks:

Related GitHub Issues:

[github-actions]

Hello. You may have forgotten to update the changelog!
Please edit doc/releases/changelog-dev.md with:

• A one-to-two sentence description of the change. You may include a small working example for new features.
• A link back to this PR.
• Your name (or GitHub username) in the contributors section.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.46%. Comparing base (d2db4bb) to head (272a681).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9755   +/-   ##
=======================================
  Coverage   99.46%   99.46%           
=======================================
  Files         634      634           
  Lines       69829    69831    +2     
=======================================
+ Hits        69455    69457    +2     
  Misses        374      374           

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