run blob tx system tests

and skip system tests that use blob indexer

.github/workflows/tests.yaml

@@ -14,7 +14,7 @@ on:
 env:
   SO_VERSION: v1.1.0-36d4969-202407091537
   FIXTURENET_ETH_STACKS_REF: main
-  SYSTEM_TESTS_REF: main
+  SYSTEM_TESTS_REF: roysc/test-blob-tx
 
 jobs:
   test:
@@ -105,7 +105,8 @@ jobs:
         run: |
           pip install pytest
           pip install -r requirements.txt
-          pytest -vv
+          # Skips tests that require Blob indexing
+          pytest -vv -m "not blob_db"
 
       - name: Run testnet stack without statediff
         env: