Attempt to fix test step on self-hosted runner.

Create a temporary home directory for the test container, and purge it
afterwards. While I was at it, also remove the podman container after
using.

.github/workflows/wkdev-sdk.yml

@@ -43,11 +43,13 @@ jobs:
         run: |
           CONTAINER="wkdev-$(date +%s)"
           source ./register-sdk-on-host.sh
-          wkdev-create --create-home --verbose --attach --no-pull -n ${CONTAINER}
+          wkdev-create --create-home --home ${HOME}/${CONTAINER}-home --verbose --attach --no-pull --name ${CONTAINER}
           wkdev-enter -n ${CONTAINER} --exec -- git clone --depth=1 https://github.com/WebKit/WebKit.git
           wkdev-enter -n ${CONTAINER} --exec -- ./WebKit/Tools/Scripts/build-webkit --wpe --release --generate-project-only
           wkdev-enter -n ${CONTAINER} --exec -- ./WebKit/Tools/Scripts/build-webkit --gtk --release --generate-project-only
           podman stop ${CONTAINER} || true
+          podman rm ${CONTAINER} || true
+          rm -rf ${HOME}/${CONTAINER}-home
 
   deploy:
     runs-on: self-hosted