github/workflows: add ARM macos build binaries job (#6427)

# Description

This PR adds the required changes to release `polkadot`,
`polkadot-parachain` and `polkadot-omni-node` binaries built on Apple
Sillicon macos.

## Integration

This addresses requests from the community for such binaries: #802, and
they should be part of the Github release page.

## Review Notes

Test on paritytech-stg solely focused on macos binaries:
https://github.com/paritytech-stg/polkadot-sdk/actions/runs/11824692766/job/32946793308,
except the steps related to `pgpkms` (which need AWS credentials,
missing from paritytech-stg). The binary names don't have a `darwin-arm`
identifier, and conflict with the existing x86_64-linux binaries. I
haven't tested building everything on `paritytech-stg` because the
x86_64-linux builds run on `unbutu-latest-m` which isn't enabled on
`pairtytech-stg` (and I haven't asked CI team to enable one), so testing
how to go around naming conflicts should be covered next.

### TODO

- [x] Test the workflow start to end (especially the last bits related
to uploading the binaries on S3 and ensuring the previous binaries and
the new ones coexist harmoniously on S3/action artifacts storage without
naming conflicts) @EgorPopelyaev
- [x] Publish the arm binaries on the Github release page - to clarify
what's needed @iulianbarbu

 . Current practice is to manually publish the
binaries built via `release-build-rc.yml` workflow, taken from S3. Would
be great to have the binaries there in the first place before working on
automating this, but I would also do it in a follow up PR.

### Follow ups

- [ ] unify the binaries building under
`release-30_publish_release_draft.yml` maybe?
- [ ] automate binary artifacts upload to S3 in
`release-30_publish_release_draft.yml`

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Signed-off-by: Iulian Barbu <[email protected]>
Co-authored-by: EgorPopelyaev <[email protected]>