fix(ingestion): fix stateful ingestion for GCS source

[josges]

Remove pipeline name before passing context to equivalent s3 source to avoid error "Checkpointing provider DatahubIngestionCheckpointingProvider already registered." Fixes this issue

Checklist

• [x] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [x] Links to related issues (if applicable)
• [x] Tests for the changes have been added/updated (if applicable)
• [x] 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.
• [x] For any breaking change/potential downtime/deprecation/big changes an entry has been made in Updating DataHub