Make it possible to set some node-specific metadata using tags (backport #12702)

Similar to #12699 but node specific.

Proposed Changes

Config node tags in config file. Store as application setting and expose them via /api/overview and rabbitmqctl status command.

Types of Changes

What types of changes does your code introduce to this project? Put an x in the boxes that apply

[ ] Bug fix (non-breaking change which fixes issue #NNNN)
[x] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause an observable behavior change in existing systems)
[ ] Documentation improvements (corrections, new content, etc)
[ ] Cosmetic change (whitespace, formatting, etc)
[ ] Build system and/or CI

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask on the mailing list. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

[x] I have read the CONTRIBUTING.md document
[x] I have signed the CA (see https://cla.pivotal.io/sign/rabbitmq)
[x] I have added tests that prove my fix is effective or that my feature works
[x] All tests pass locally with my changes
[x] If relevant, I have added necessary documentation to https://github.com/rabbitmq/rabbitmq-website
[x] If relevant, I have added this change to the first version(s) in release-notes that I expect to introduce it

Further Comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc.

This is an automatic backport of pull request #12702 done by Mergify.

Cherry-pick of 3d35416635cc4567f2da8f07095eadd7e70155de has failed:

On branch mergify/bp/v4.0.x/pr-12702
Your branch is up to date with 'origin/v4.0.x'.

You are currently cherry-picking commit 3d35416635.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Changes to be committed:
    modified:   deps/rabbit/priv/schema/rabbit.schema
    modified:   deps/rabbit/src/rabbit.erl
    modified:   deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/status_command.ex
    modified:   deps/rabbitmq_management/src/rabbit_mgmt_wm_overview.erl

Unmerged paths:
  (use "git add <file>..." to mark resolution)
    both modified:   deps/rabbitmq_management/test/rabbit_mgmt_http_SUITE.erl

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

rabbitmq / rabbitmq-server