update integration CI to preserve charmcraft's cache between builds

.github/workflows/integrate.yaml

@@ -68,45 +68,45 @@ jobs:
           juju-channel: 3.1/stable
           charmcraft-channel: latest/candidate
 
-    - name: Setup Charmcraft's cache
-      id: cache
-      uses: actions/cache@v4
-      with:
-        path: ${{ env.CRAFT_SHARED_CACHE }}
-        # Cache keys must be unique - there is no overwrite mechanic.  Add IDs to avoid this (is there a better set of IDs?)
-        # partial ref: https://github.com/actions/cache/blob/main/tips-and-workarounds.md#update-a-cache
-        # To match the most recent previous cache, use restore-keys with the craft-shared-cache prefix.  This will hit the
-        # "first" match, which will be from the most recent run.  
-        # ref: https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
-        key: craft-shared-cache-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}-${{ strategy.job-index }}
-        restore-keys: craft-shared-cache
+      - name: Setup Charmcraft's cache
+        id: cache
+        uses: actions/cache@v4
+        with:
+          path: ${{ env.CRAFT_SHARED_CACHE }}
+          # Cache keys must be unique - there is no overwrite mechanic.  Add IDs to avoid this (is there a better set of IDs?)
+          # partial ref: https://github.com/actions/cache/blob/main/tips-and-workarounds.md#update-a-cache
+          # To match the most recent previous cache, use restore-keys with the craft-shared-cache prefix.  This will hit the
+          # "first" match, which will be from the most recent run.  
+          # ref: https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows#matching-a-cache-key
+          key: craft-shared-cache-${{ github.run_id }}-${{ github.run_attempt }}-${{ github.job }}-${{ strategy.job-index }}
+          restore-keys: craft-shared-cache
 
-    # DEBUG: remove this
-    - name: emit charmcraft cache directory contents
-      run: |
-        find $CRAFT_SHARED_CACHE | wc -l
-        find $CRAFT_SHARED_CACHE/wheels | wc -l
+      # DEBUG: remove this
+      - name: emit charmcraft cache directory contents
+        run: |
+          find $CRAFT_SHARED_CACHE | wc -l
+          find $CRAFT_SHARED_CACHE/wheels | wc -l
 
       - name: Run integration tests
         run: |
           juju add-model test-istio
           tox -e ${{ matrix.integration-types }} -- --model test-istio
         timeout-minutes: 80
 
-    # DEBUG: remove this
-    - name: emit charmcraft cache directory contents
-      run: |
-        find $CRAFT_SHARED_CACHE | wc -l
-        find $CRAFT_SHARED_CACHE/wheels | wc -l
-  
-      - name: Setup Debug Artifact Collection
-        run: mkdir tmp
-        if: failure()
-
-      - name: Collect charmcraft logs
-        if: failure()
+      # DEBUG: remove this
+      - name: emit charmcraft cache directory contents
         run: |
-          cat /home/runner/.local/state/charmcraft/log/charmcraft-*.log | tee tmp/charmcraft.log
+          find $CRAFT_SHARED_CACHE | wc -l
+          find $CRAFT_SHARED_CACHE/wheels | wc -l
+    
+        - name: Setup Debug Artifact Collection
+          run: mkdir tmp
+          if: failure()
+
+        - name: Collect charmcraft logs
+          if: failure()
+          run: |
+            cat /home/runner/.local/state/charmcraft/log/charmcraft-*.log | tee tmp/charmcraft.log
   
       - name: Collect Juju status
         if: failure()