CI: restore cache + free some disk space (#6068)

* CI: restore cache + free some disk space

Author: marxin

.github/workflows/test.yaml

@@ -828,9 +828,29 @@ jobs:
               container: "alpine:edge",
             },
           ]
-    container: ${{ matrix.metadata.container }}
+    container:
+      image: ${{ matrix.metadata.container }}
+      volumes:
+        - /usr/local:/host/usr/local
     steps:
       - uses: actions/checkout@v6
+      - name: Show disk capacity
+        if: startsWith(matrix.metadata.build, 'linux')
+        run: df -h
+      # Saves ~21 GiB
+      - name: Clean up disk space (container)
+        run: |
+          rm -rf /__t/*
+          rm -rf /host/usr/local/.ghcup
+          rm -rf /host/usr/local/lib/android
+        if: startsWith(matrix.metadata.build, 'linux') && matrix.metadata.container != ''
+      # Saves ~16 GiB
+      - name: Clean up disk space (native)
+        run: |
+          sudo rm -rf /__t/*
+          sudo rm -rf /usr/local/.ghcup
+          sudo rm -rf /usr/local/lib/android
+        if: startsWith(matrix.metadata.build, 'linux') && matrix.metadata.container == ''
       - name: Show disk capacity
         if: startsWith(matrix.metadata.build, 'linux')
         run: df -h
@@ -909,8 +929,6 @@ jobs:
           EOF
         if: matrix.metadata.target
       - name: Cache
-        # TODO: fix disk space issue for a couple of Linux runners
-        if: ${{ !(matrix.stage.make == 'test-stage-5-test-examples' && (matrix.metadata.build == 'linux-musl' || matrix.metadata.build == 'linux-x64')) }}
         # TODO: v3 is unable to Restore the cache for some reason
         uses: whywaita/actions-cache-s3@v2
         with: