Removing first-party entries from trustedActionsOwnerDataModel

[bradam12]

I would like to see the ability to remove the first-party orgs from the trustedActionsOwnerDataModel, enabling unpinned warnings on first-party actions. If we're mandating SHA pinning on all external actions but GitHub's actions get overlooked, it leaves a gap in our code scanning.

Current usage:

extensions:
  - addsTo:
      pack: codeql/actions-all
      extensible: trustedActionsOwnerDataModel
    data:
      - ["org1"]
      - ["org2"]

Potential (psuedocode, not real working examples):

extensions:
  - addsTo:
      pack: codeql/actions-all
      extensible: trustedActionsOwnerDataModel
    data:
      - ["org1"]
      - ["org2"]
      - ["!github"] # this syntax
      - ["!actions"]
      - ["!advanced-security"]

  - removesFrom: # or this syntax?
      pack: codeql/actions-all
      extensible: trustedActionsOwnerDataModel
    data:
      - ["github"]
      - ["actions"]
      - ["advanced-security"]

  - addsTo:  # or this?
      pack: codeql/actions-all
      extensible: distrustedActionsOwnerOverrideDataModel # new
    data:
      - ["github"]
      - ["actions"]
      - ["advanced-security"]