[next] Wheel build fixes: manylinux1, trigger upload on release, Linux AArch64...

[Rot127]

Your checklist for this pull request

• I've documented or updated the documentation of every API function and struct this PR changes.
• I've added tests that prove my fix is effective or that my feature works (if possible)

Detailed description

Fixes several issues:

• Trigger build of wheels on push and PRs.
• Enable AArch64 binaries for Linux again, incorrectly removed in [next] Updates and fixes to the Python wheel builder workflow #2441
• Add musllinux package to test script.
• Trigger upload only on full releases.

Test plan

Only one attempted upload (failing job published):
https://github.com/Rot127/capstone/actions

Lists correct wheels in: https://github.com/Rot127/capstone/actions/runs/10448404651

Closing issues

closes #2449

[doronz88]

I'm not sure but possibly needing to add merge-multiple: true to download-artifacts as described in #2449 as the latest arm64 remains broken with latest version

[Rot127]

Ah ok, now I get what you mean. Let me quickly check the docs of gh-action-pypi-publish action again. This behavior seems weird to me.