Rename "master" branch to "devel"

[nixpanic]

This PR renames all occasions of "master" to "devel" where the reference is relevant to Ceph-CSI.

Once this PR is merged, an admin of the GitHub project will need to rename the branch before next PRs can get merged. The GitHub documentation describes that all the existing PRs for the "master" branch will automatically be updated to the new "devel" branch.

A 2nd PR is filed to update the "ci/centos" branch (PR #1891), so that the CI jobs use the new branch name.

See-also: https://docs.github.com/en/github/administering-a-repository/renaming-a-branch
Updates: #1193

---

Show available bot commands

These commands are normally not required, but in case of issues, leave any of
the following bot commands in an otherwise empty comment in this PR:

• /retest ci/centos/<job-name>: retest the <job-name> after unrelated
  failure (please report the failure too!)
• /retest all: run this in case the CentOS CI failed to start/report any test
  progress or results

[humblec]

Thanks @nixpanic .. commitlint error out in this version of the patch.

[humblec]

One other suggestion I have here is, imo, its good to document about this change for history with details on why we do that..etc. What do you think ?

[nixpanic]

Thanks @nixpanic .. commitlint error out in this version of the patch.

commitlint failed because it tries to use the devel branch now, and that does not exist. Please review the commits manually.

[nixpanic]

One other suggestion I have here is, imo, its good to document about this change for history with details on why we do that..etc. What do you think ?

That can be expanded in #1193 if you think that is not sufficient. I do not think we need to document it in the repository itself?

[Madhu-1]

Merging the PR manually

[Madhu-1]

@Mergifyio backport release-v3.2

[mergify]

Command backport release-v3.2: failure

No backport have been created

• Backport to branch release-v3.2 failed
  Git reported the following error:

fatal: couldn't find remote ref master

[Madhu-1]

@nixpanic can you please backport this to release-3.2 branch? as a change from this is missing in release-v3.2 branch CI is failing at #2041

[humblec]

@nixpanic can you please backport this to release-3.2 branch? as a change from this is missing in release-v3.2 branch CI is failing at #2041

May be to all previous releases ?

[nixpanic]

@nixpanic can you please backport this to release-3.2 branch? as a change from this is missing in release-v3.2 branch CI is failing at #2041

Sure, will do!

[nixpanic]

@nixpanic can you please backport this to release-3.2 branch? as a change from this is missing in release-v3.2 branch CI is failing at #2041

May be to all previous releases ?

What other older releases are still maintained?