Add a workflow which automatically adds backport tags based upon changelogs

[tremble]

SUMMARY

As has been recently noticed, we're being inconsistent with backporting things.

Based on the keys from the changelog fragments this action would perform the following actions:

• On "push" or applying the mergeit label
  • If a PR contains non-backportable changes (major_changes, breaking_changes, removed_features) the do_not_backport label will be applied. These change types are assumed to require a "major" release, and as such shouldn't be backported into a currently "stable" release. At the same time it will remove any previously applied backport-* labels.
• When the "mergeit" label is applied:
  • If a PR contains changes that only need a minor release (minor_changes, deprecated_features) the backport-9 label will be applied.
  • If a PR contains changes that only need a patch release, such as security/bug fixes (bugfixes, security_fixes), then backport-8 and backport-9 labels will both be applied.

ISSUE TYPE

• Feature Pull Request

COMPONENT NAME

.github/workflows

ADDITIONAL INFORMATION

tremble/amazon.aws currently has this workflow applied to it, if you want to test it out. (tremble#11 is the PR I've been testing with, but feel free to open your own PR and play with the labels against my fork.

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/cda2e6f7472544a096b3567b9e0dfc6b

✔️ ansible-galaxy-importer SUCCESS in 4m 20s
✔️ build-ansible-collection SUCCESS in 10m 06s

[abikouo]

I did something similar here anyway I will close mine.
Could you please move the workflow into ansible-network/github_actions repository so we can use it in multiple repositories?

[tremble]

I did something similar here anyway I will close mine. Could you please move the workflow into ansible-network/github_actions repository so we can use it in multiple repositories?

Sure, if you've got any comments on the "how" behind this PR I'd appreciate a cursory review here.

[alinabuzachis]

Can you please update the release process guideline by adding the action to update this file?

[tremble]

Can you please update the release process guideline by adding the action to update this file?

Yup, will do. @abikouo would like the action moved over into the shared repo. Which I'll do first and should also simplify this file down.

[github-actions]

Docs Build 📝

Thank you for contribution!✨

This PR has been merged and your docs changes will be incorporated when they are next published.

[softwarefactory-project-zuul]

Build succeeded.
https://ansible.softwarefactory-project.io/zuul/buildset/757d41bab84e4dd0bedb588e4c45e7c6

✔️ ansible-galaxy-importer SUCCESS in 3m 24s
✔️ build-ansible-collection SUCCESS in 10m 01s

[softwarefactory-project-zuul]

Build succeeded (gate pipeline).
https://ansible.softwarefactory-project.io/zuul/buildset/77bd25be2815427b88ac491902331d57

✔️ ansible-galaxy-importer SUCCESS in 3m 26s
✔️ build-ansible-collection SUCCESS in 10m 09s

[softwarefactory-project-zuul]

Pull request merge failed: Resource not accessible by integration, You may need to manually rebase your PR and retry.