ci: deduplicate depends building

[PastaPastaPasta]

Issue being fixed or feature implemented

Currently we build the same host / options multiple times. Don't do this!

What was done?

Now building depends only twice

How Has This Been Tested?

Local CI appears to be working

Breaking Changes

None

Checklist:

Go over all the following points, and put an x in all the boxes that apply.

• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have added or updated relevant unit/integration/functional/e2e tests
• [ ] I have made corresponding changes to the documentation
• [x] I have assigned this pull request to a milestone (for repository code-owners and collaborators only)

[PastaPastaPasta]

CI on my branch functioning as expected / passing: https://github.com/PastaPastaPasta/dash/actions/runs/11897504945

[UdjinM6]

probably worth backporting to v22

[PastaPastaPasta]

I think that commit looks good