Update BTR release scripts to look at catalog-info.yaml for release info.

[feanil]

The tag_release.py script in repo-tools currently looks at the openedx.yaml file to determine if a repo should be tagged for an open-edx release. But we want to move this information into the catalog-info.yaml file.

Currently it looks for the openedx-release key in an openedx.yaml. eg.

openedx-release:
  ref: main

We want it to check to see if there is a catalog-info.yaml file and if it has an annotation for the openedx-release. eg.

metadata:
  annotations:
    openedx.org/release: "main"

Tasks

• Update the tag_release.py script to read from both locations and prefer the info in catalog-info.yaml if it exists.
• Get it reviewed by nedbat (You can still tag @feanil or other Aximprovements members for review first.)

[salman2013]

@feanil
For the openedx.yaml file there is an addition method which check for parent repo and add some more information. is there a similar case that exists for the catalog-info.yaml file?
if yes then i would also need to update this as the format for the catalog-info.yaml file is different and it is checking
openedx-release tag.

def trim_dependent_repos(repos):
    """Remove dependent repos (an obsolete feature of this program).

    Repos with 'parent-repo' in their 'openedx-release' data are removed from
    the `repos` dict.  A new dict of repos is returned.

    """
    trimmed = {}

    for r, data in repos.items():
        if 'parent-repo' in data['openedx-release']:
            msg = f"Repo {r} is dependent: you can remove openedx-release from its openedx.yaml file"
            click.secho(msg, fg='yellow')
        else:
            trimmed[r] = data

    return trimmed

[feanil]

You can ignore this function, it should probably get removed. See the first line of the docstring. This feature is obsolete and we don't need to port it as a part of your changes.

[salman2013]

PR link #467