add other_signatories field to extrinsics table

Author: hey-michal

scraper_service/shovel_extrinsics/utils.py

@@ -76,6 +76,7 @@ def get_column_type(value, value_type=None, key=None):
     "info__email__Raw0": "String",
     "info__twitter__Raw0": "String",
     "info__web__Raw0": "String",
+    "other_signatories": "Array(String)",
     "calls": "Array(String)",
     "call__call_args": "Array(String)",
     "transaction__EIP1559__access_list": "Array(String)",