CI: Parallel Build / Cross Compilation

[ElectricalBoy]

This PR adds:

• Further parallelism in the build workflow
• Enables (cross-)compilation for arm64 (possibly resolves Add support for ARM platforms - arm64 and armhf #572)
  I own a Surface Pro X (a niche platform IMO... lol) myself and can confirm that a "working" build for windows/arm64 is generated with the changed workflow. See https://github.com/ElectricalBoy/ytmdesktop/actions/runs/6281142179 for POC.

[Alipoodle]

From my initial review, I believe we might have some problems with not all platforms being supported within GitHub Actions.
To my knowledge ARM workers didn't appear to actually exist for GitHub?

MacOS ARM + Linux ARM didn't exist when I checked, and Linux doesn't allow for building for ARM on a x64 platform.
However with whatever method you're trying it appears to work 😄

[Alipoodle]

I believe that we should also have this effect the publish GitHub Action as well.

However I've just seen that @NovusTheory recently removed the MacOS (Arm) support until there is a native support for it in Actions.

[NovusTheory]

However I've just seen that @NovusTheory recently removed the MacOS (Arm) support until there is a native support for it in Actions.

@Alipoodle Having arm64 specified would still produce a build successfully though I believe running it would just leave it being damaged (refer to macOS). That's why I stripped out the macOS from publish so we're not publishing broken builds on releases. I'm perfectly fine with the CI having them though for commit push builds. I'd say leave this out of the publish workflow for now

[ElectricalBoy]

To my knowledge ARM workers didn't appear to actually exist for GitHub?

That is a no (i.e., all GitHub-hosted runners are x64 ATM) - although GH Actions could be set up and run on self-hosted ARM64 runners.

I believe running it would just leave it being damaged (refer to macOS).

To my knowledge, ARM64 builds still can be generated on x64 runners via cross compilation. I have verified cross compilation working with Windows ARM64 (again, I have a Surface Pro X myself to test), and believe that this PR is generating macOS ARM64 and Linux ARM64 builds successfully. I tested the Linux ARM64 build and can verify it working, but I don't have a M1/M2 Mac to verify the Mac ARM64 build.

[NovusTheory]

After looking into each binary I can confirm they all report the ARM architecture. I ran one of the linux builds on an old raspberry pi I have and it worked just fine. I'm going to mimic this workflow in the publish workflow and on next release it should contain every architecture.

Besides the architecture concerns I'm happy with the better build parallelization. Thank you