[31084] Enable Notify Slack and vagovstaging for Manual Deploy (#19147)
[31084] Enable Notify Slack and vagovstaging for Manual Deploy (#19147)

* Add manual deploy workflow for dev/staging

* Use notify slack composite action

* Newline fix

* Temporarily disable slack notification and staging deploys

* Enable notify slack and staging for manual deploy
department-of-veterans-affairs/vets-website,department-of-veterans-affairs/vets-website