[ci] Enable ccache in container build.

scripts/ci/jobs/container.yml

@@ -8,8 +8,17 @@ container:
   extends:
     - .container-maker-setup
   script:
-    - python ThirdParty/container-maker/ogscm/cli.py -B -C -R --ogs . --pm system --cvode --build_args ' --progress=plain'
-    - python ThirdParty/container-maker/ogscm/cli.py -B -C -R --ogs . --pm system --cvode --ompi 4.0.4 --base_image centos:8 --build_args ' --progress=plain'
+    - >
+      python ThirdParty/container-maker/ogscm/cli.py -B -C -R --ogs .
+      --build_args ' --progress=plain'
+      --pm system --cvode --ccache
+      --cmake_args ' -DBUILD_TESTING=OFF'
+    - >
+      python ThirdParty/container-maker/ogscm/cli.py -B -C -R --ogs .
+      --build_args '--progress=plain'
+      --pm system --cvode --ccache
+      --cmake_args ' -DBUILD_TESTING=OFF'
+      --ompi 4.0.4 --base_image centos:8
   artifacts:
     name: container
     paths: