Add USE_SQL to filter whitelist
Add USE_SQL to filter whitelist

Otherwise the filter interferes with diego manifest generation as follows:

```
sql:
  ca_cert: null
  db_connection_string: [redacted USE_SQL]://diego:admin@10.244.0.30:5524/diego
  db_driver: [redacted USE_SQL]
  max_open_connections: 500
  require_ssl: null
```

[#133939473]

Signed-off-by: James Wen <3b2f4c88287a5fcd7db73a67dd1ab82807db04ee@columbia.edu>

cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci,cloudfoundry/buildpacks-ci