[SEC-3232]Add template and remove old deployment stuff

[roryscarson]

No description provided.

[roryscarson]

There was an error verifying catalog-info-template.yaml:
Error: "metadata.name" is not valid; expected a string that is sequences of [a-zA-Z0-9] separated by any of [-_.], at most 63 characters in total but found "${{ github.event.repository.name }}". To learn more about catalog file format, visit: https://github.com/backstage/backstage/blob/master/docs/architecture-decisions/adr002-default-catalog-file-format.md

ugggghhhh

[roryscarson]

@karankohli-cf this is probably good for now. Depending on how the code to create the PR will handle creating the file we might need to change the template from envvars to something else, but all the info we want to track is here.