fix: use correct condition and simpler while

.github/workflows/sub-deploy-integration-tests-gcp.yml

@@ -276,7 +276,7 @@ jobs:
 
       # Format the mounted disk if the test doesn't use a cached state.
       - name: Format ${{ inputs.test_id }} volume
-        if: ${{ !inputs.needs_zebra_state || !inputs.needs_lwd_state }}
+        if: ${{ !inputs.needs_zebra_state && !inputs.needs_lwd_state }}
         shell: /usr/bin/bash -ex {0}
         run: |
           gcloud compute ssh ${{ inputs.test_id }}-${{ env.GITHUB_REF_SLUG_URL }}-${{ env.GITHUB_SHA_SHORT }} \
@@ -286,7 +286,7 @@ jobs:
           --ssh-flag="-o ConnectTimeout=5" \
           --command \
           "\
-          while [[ ! -e /dev/sdb ]] || sudo lsof /dev/sdb &>/dev/null; do \
+          while sudo lsof /dev/sdb; do \
             echo 'Waiting for /dev/sdb to be free...'; \
             sleep 10; \
           done; \