ci: cleanup zephyr workspace

Remove existing zephyr workspace and remove the .west directory.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

Author: nashif

.github/workflows/ci.yml

@@ -1423,6 +1423,9 @@ jobs:
 
         # Create Zephyr workspace
         ZEPHYR_WORKSPACE=${GITHUB_WORKSPACE}/zephyrproject
+        sudo rm -rf ${ZEPHYR_WORKSPACE}/.west
+        sudo rm -rf ${ZEPHYR_WORKSPACE}
+        ls -la  ${ZEPHYR_WORKSPACE}
         west init ${ZEPHYR_WORKSPACE}
         cd ${ZEPHYR_WORKSPACE}