ci: speed up run_test_case jobs with cache

.github/workflows/run_test_cases.yaml

@@ -15,14 +15,35 @@ jobs:
     run_proper_test:
         strategy:
           matrix:
-            emqx_builder:
-              - 5.0-3:24.1.5-3
+            otp:
+              - 24.1.5-3
+            os:
+              - ubuntu20.04
+            arch:
+              - amd64
 
         runs-on: ubuntu-20.04
-        container: "ghcr.io/emqx/emqx-builder/${{ matrix.emqx_builder }}-ubuntu20.04"
+        container: "ghcr.io/emqx/emqx-builder/5.0-3:${{ matrix.otp }}-${{ matrix.os }}"
 
         steps:
         - uses: actions/checkout@v2
+
+        - name: Get deps git refs for cache
+           id: deps-refs
+           run: |
+             scripts/get-dep-refs.sh
+             make clean-all
+         - name: load rocksdb cache
+           uses: actions/cache@v2
+           with:
+             path: source/_build/default/lib/rocksdb/
+             key: ${{ matrix.os }}-${{ matrix.otp }}-${{ matrix.arch }}-${{ steps.deps-refs.outputs.DEP_ROCKSDB_REF }}
+         - name: load quicer cache
+           uses: actions/cache@v2
+           with:
+             path: source/_build/default/lib/quicer/
+             key: ${{ matrix.os }}-${{ matrix.otp }}-$${{ matrix.arch }}-${{ steps.deps-refs.outputs.DEP_QUICER_REF }}
+
         - name: proper
           run: make proper