.github: clean up stale containers and ports

Fixes the following issue, see also https://devops.stackexchange.com/a/17853/26590:

make[1]: Entering directory '/home/github-jaffa/actions-runner/_work/infix/infix/buildroot'
/home/github-jaffa/actions-runner/_work/infix/infix/test/env -r -b /home/github-jaffa/actions-runner/_work/infix/infix
/home/github-jaffa/actions-runner/_work/infix/infix/test/9pm/9pm.py -v
/home/github-jaffa/actions-runner/_work/infix/infix/test/case/all-repo.yaml
/home/github-jaffa/actions-runner/_work/infix/infix/test/case/all-unit.yaml
Error: rootlessport conflict with ID 1
make[1]: *** [/home/github-jaffa/actions-runner/_work/infix/infix/test/test.mk:58: test-unit] Error 126
make[1]: Leaving directory '/home/github-jaffa/actions-runner/_work/infix/infix/buildroot'
make: *** [Makefile:31: test-unit] Error 2

Signed-off-by: Joachim Wiberg <[email protected]>

Author: troglobit

.github/workflows/build.yml

@@ -110,6 +110,11 @@ jobs:
         run: |
           make ${{ env.TARGET }}_defconfig
 
+      - name: Cleanup stale containers and ports
+        run: |
+          podman rm -af || true
+          pkill -9 -f rootlessport || true
+
       - name: Unit Test ${{ env.TARGET }}
         run: |
           make test-unit