fix(warehouses): Fix environment variable name after Opralog pipeline refactor (#179)

### Summary

After refactor in #177 

<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit

* **Chores**
* Restructured SQL credentials environment variable configuration for
improved clarity and simplicity. The credential keys have been
reorganised to use a flatter, more intuitive hierarchy. Users
maintaining custom environment variable configurations should review the
changes and update their setup accordingly to ensure continued
compatibility.

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settings.</sub>

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Author: martyngigg

infra/ansible-docker/playbooks/elt/templates/secrets/envvars.j2

@@ -2,13 +2,13 @@ SOURCES__M365__CREDENTIALS__TENANT_ID={{ vault_ingestion_msgraph_directory_id }}
 SOURCES__M365__CREDENTIALS__CLIENT_ID={{ vault_ingestion_msgraph_client_id }}
 SOURCES__M365__CREDENTIALS__CLIENT_SECRET={{ vault_ingestion_msgraph_client_secret }}
 
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__DRIVERNAME=mssql+pymssql
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__DATABASE=OpralogWebDB
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__SCHEMA=dbo
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__PORT=1433
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__HOST={{ vault_ingestion_opralogweb_host }}
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__USERNAME={{ vault_ingestion_opralogweb_user }}
-OPRALOGWEB__SOURCES__SQL_DATABASE__CREDENTIALS__PASSWORD={{ vault_ingestion_opralogweb_passwd }}
+OPRALOGWEB__SOURCES__CREDENTIALS__DRIVERNAME=mssql+pymssql
+OPRALOGWEB__SOURCES__CREDENTIALS__DATABASE=OpralogWebDB
+OPRALOGWEB__SOURCES__CREDENTIALS__SCHEMA=dbo
+OPRALOGWEB__SOURCES__CREDENTIALS__PORT=1433
+OPRALOGWEB__SOURCES__CREDENTIALS__HOST={{ vault_ingestion_opralogweb_host }}
+OPRALOGWEB__SOURCES__CREDENTIALS__USERNAME={{ vault_ingestion_opralogweb_user }}
+OPRALOGWEB__SOURCES__CREDENTIALS__PASSWORD={{ vault_ingestion_opralogweb_passwd }}
 
 DESTINATION__PYICEBERG__BUCKET_URL=s3://{{ lakekeeper_catalog.warehouses[warehouse.name].storage.bucket_name }}
 DESTINATION__PYICEBERG__CREDENTIALS__URI={{ lakekeeper_catalog.uri }}