ci: use v1 of integration-testing-setup for v1 tests (#505)

Author: fstr

.github/workflows/nightly-v1.yml

@@ -57,7 +57,7 @@ jobs:
 
       - name: Setup database and engine
         id: setup
-        uses: firebolt-db/integration-testing-setup@813c4835ef38adcba3f8760e7afc21a3c7248023 # v2.6.2
+        uses: firebolt-db/integration-testing-setup@eb35b7719247c93392cb3a8aa4f554a4c11a770b # v1.0.3
         with:
           firebolt-username: ${{ secrets.FIREBOLT_STG_USERNAME }}
           firebolt-password: ${{ secrets.FIREBOLT_STG_PASSWORD }}