ci: Migrate crazy-max/ghaction-import-gpg to Step Security maintained version

[andrewb1269hg]

Background

Step-security is maintaining a list of actions with low scores. We need to update our third party actions to use
only actions with high scores. Step-security is now maintaining forked versions of utilized actions that should
be used. This story intends to update the actions listed below in Step-Security Actions.

Step-Security Action(s)

Update github actions with step-security maintained version

• Original Action: crazy-max/ghaction-import-gpg - Step Security Maintained Action: step-security/ghaction-import-gpg File(s): flow-release-scaleset-images.yaml flow-release-legacy-images.yaml

Acceptance Criteria

• All required actions have been updated