Merge #6402: ci: cache built

9604d87af1 ci: cache depends/built like gitlab (pasta)

Pull request description:

  ## Issue being fixed or feature implemented
  Depends build didn't seem to be caching properly

  ## What was done?
  changed depends/${{ matrix.host }} to depends/built as gitlab does

  ## How Has This Been Tested?
  Depends "build" now takes only ~1 minute instead of ~15 minutes in CI: https://github.com/PastaPastaPasta/dash/actions/runs/11899038167

  ## Breaking Changes
  None

  ## Checklist:
  - [ ] 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)_

ACKs for top commit:
  UdjinM6:
    utACK 9604d87af1
  kwvg:
    utACK 9604d87af1

Tree-SHA512: 63d2321f41b284be6cc2f0b2d53294cf220b1623af464d411225c0e43ec14268e1c3a701e23973e5c641925b6ea28dcb92062d8cefb9e6baed6ac5bb619ce1a1

.github/workflows/build.yml

@@ -90,7 +90,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: |
-            depends/${{ matrix.host }}
+            depends/built
           key: ${{ runner.os }}-depends-${{ matrix.build_target }}-${{ hashFiles('depends/packages/*') }}
           restore-keys: |
             ${{ runner.os }}-depends-${{ matrix.build_target }}-${{ hashFiles('depends/packages/*') }}