fix(ingestion/grafana): fix fails caused by text panels in ingestion

[acrylJonny]

1. Fixing issues caused by text panels not having upstream lineage
2. Cater for rawSQL, rawSql inconsistencies across different datasources - different datasources return different items from the API.
3. Emit dataset lineage even when column level lineage cannot be determined.

[codecov]

Codecov Report

❌ Patch coverage is 90.39548% with 17 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...ion/src/datahub/ingestion/source/grafana/models.py	90.16%	12 Missing ⚠️
...rc/datahub/ingestion/source/grafana/field_utils.py	88.57%	4 Missing ⚠️
...rc/datahub/ingestion/source/grafana/grafana_api.py	80.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[sgomezvillamor]

what about ?

Suggested change

	raw_sql = ""
	for key, value in target.items():
	if key.lower() == "rawsql" and value:
	raw_sql = value
	break
	raw_sql = target.get("rawSql") or target.get("rawSQL") or target.get("rawsql")

any other variant to be considered?

[acrylJonny]

The short answer is that this is dictated by the implementation of the individual connector - so, although we've found Athena to be different to Postgres, there may be more, hence why leaving it as flexible would I think be best.

[sgomezvillamor]

same as before

[sgomezvillamor]

same here