test(ci): do not restore rust cache on self-hosted runners

it is around ~4GB and dominates the run time, easier to download/compile
locally per run than download it

Author: mikehardy

.github/workflows/build-quick.yml

@@ -174,7 +174,7 @@ jobs:
       - name: Restore Rust Cache (Unix)
         id: rust-cache-unix
         uses: actions/cache/restore@v5
-        if: contains(matrix.os, 'windows') == false
+        if: contains(matrix.os, 'windows') == false && !contains(runner.environment, 'self-hosted')
         with:
           path: |
             ~/.cargo/registry

.github/workflows/build-release.yml

@@ -78,6 +78,7 @@ jobs:
           echo "$HOME/.cargo/bin" >> $GITHUB_PATH
 
       - name: Restore Rust Cache
+        if: !contains(runner.environment, 'self-hosted')
         id: rust-cache
         uses: actions/cache/restore@v5
         with: