Update GitHub Actions workflows to latest

[leptos-null]

What does this implement/fix? Explain your changes.

Changes from commits:

• Update actions/checkout to v4
• Always use latest theos/theos upstream
• Remove TODO to use a matrix for release workflow
  • A matrix would be more difficult to manage because all the artifacts would need to be uploaded and then downloaded to attach to the release
• Migrate to creating GitHub Releases using the official CLI
  • The actions/checkout action is no longer maintained
  • Also migrate to workflow specific-tokens instead of an access token stored in Secrets
• Migrate to latest step output API
• Switch test workflow to use same steps as release workflow
  • Using the a build workflow closer to the release workflow means we're testing the code closer what will be deployed

Does this close any currently open issues?

No

Any relevant logs, error output, etc?

• Tag deploy from this PR: https://github.com/leptos-null/orion/actions/runs/9142424939
• Successful test run: https://github.com/leptos-null/orion/actions/runs/9142279869
• Failing test run: https://github.com/leptos-null/orion/actions/runs/9142386514

Where has this been tested?

Operating System: macOS 11

Platform: macOS

Target Platform: iOS

[leptos-null]

The CI for this pull request is failing (as intended) currently. #35 should fix these.

[RUGMJ]

Wouldnt keeping the theos version fixed be better to prevent a theos update breaking orion builds?

[leptos-null]

Wouldnt keeping the theos version fixed be better to prevent a theos update breaking orion builds?

Yes, usually it's a good idea to version-pin dependencies, however theos is designed to be highly backward compatible.
This is also a theos repository.

[kabiroberai]

let's merge #35 first and make CI green again, will review this after that.

[kabiroberai]

🚀