feat(redshift): Fetch lineage from unload queries

[mmmeeedddsss]

In this PR, I'm adding a new query to redshift ingestion source to fetch lineages created as a cause of unload queries (See redshift doc for unload statement).

This change has been manually tested. I observe the lineages from unload queries as:

[2023-01-11 23:41:22,159] INFO     {datahub.ingestion.source.sql.redshift:841} - Lineage[LineageItem(dataset=LineageDataset(platform=<LineageDatasetPlatform.S3: 's3'>, path='s3-bucket/some_prefix/0000_part_00'), upstreams={LineageDataset(platform=<LineageDatasetPlatform.REDSHIFT: 'redshift'>, path='prod.schema_1.table_1')}, collector_type=<LineageCollectorType.UNLOAD: 'unload'>, dataset_lineage_type='TRANSFORMED', query_parser_failed_sqls=[])]:LineageItem(dataset=LineageDataset(platform=<LineageDatasetPlatform.S3: 's3'>, path='s3-bucket/some_prefix/0000_part_00'), upstreams={LineageDataset(platform=<LineageDatasetPlatform.REDSHIFT: 'redshift'>, path='prod.schema_1.table_1')}, collector_type=<LineageCollectorType.UNLOAD: 'unload'>, dataset_lineage_type='TRANSFORMED', query_parser_failed_sqls=[])

Checklist

• The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• Tests for the changes have been added/updated (if applicable)
• Docs related to the changes have been added/updated (if applicable). If a new feature has been added a Usage Guide has been added for the same.

[jjoyce0510]

We are taking a look shortly!

Cheers
John

[mmmeeedddsss]

@treff7es a friendly reminder for the requested review 👋🏻

[treff7es]

lgtm