chore(ci): Only run ember tests when ember files are affected

[mydea]

This is a draft of an idea to only run CI for a package if that package was actually affected by changes.

Basically, the logic is:

• If anything outside of ./packages has changed (e.g. yarn.lock, ...)
• If a given package or any of its dependencies has changed (using https://github.com/neoxia/is-workspace-affected)

If this is something we'd like to explore, I need to actually verify that this works as expected 😅 But in theory it appears straightforward.

[AbhiPrasad]

I think we should try using https://github.com/getsentry/paths-filter, seems other folks at Sentry are using this.

Might help with the nextjs tests not running all the time.

[mydea]

I think we should try using https://github.com/getsentry/paths-filter, seems other folks at Sentry are using this.

Might help with the nextjs tests not running all the time.

While that looks nice, as far as I can see that does not check dependencies of packages - e.g. you need to explicitly define, for the ember example, something like:

- uses: dorny/paths-filter@v2
  id: changes
  with:
    filters: |
      src:
        - 'packages/ember/**'
        - 'packages/utils/**'
        - 'packages/browser/**'
        - etc

Which of course works, but means we need to make sure to keep this in sync everywhere. But we could also pretty easily get started with such an approach, at least for specific things like nextjs.