.github: testbench: stop using container to build test topologies

Ubuntu 22.04 has ALSA 1.2.6 without ASRC failure #2543

Building in the container is much slower and updating the container is
also very time-consuming. Must be used only when really required.

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

.github/workflows/pull-request.yml

@@ -106,20 +106,15 @@ jobs:
       - uses: actions/checkout@v2
         with: {fetch-depth: 5}
 
-      - name: apt get valgrind
-        run: sudo apt-get update && sudo apt-get -y install valgrind
-
-      - name: docker
-        run: docker pull thesofproject/sof && docker tag thesofproject/sof sof
+      - name: apt get
+        run: sudo apt-get update &&
+             sudo apt-get -y install valgrind alsa-utils
 
       # testbench needs some topologies.
-      # Use our docker container to avoid the "unsupported widget type asrc"
-      # bug in ALSA 1.2.2
-      # https://github.com/thesofproject/sof/issues/2543
       - name: build test topologies
-        run: ./scripts/docker-run.sh ./scripts/build-tools.sh -t ||
+        run: ./scripts/build-tools.sh -t ||
              VERBOSE=1 NO_PROCESSORS=1 USE_XARGS=no
-             ./scripts/docker-run.sh ./scripts/build-tools.sh -t
+             ./scripts/build-tools.sh -t
 
       - name: build testbench
         run: ./scripts/rebuild-testbench.sh