fix(destination-motherduck): properly leverage source_defined_primary_key when defined (CDK bump) (#62133)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: AJ Steers <aj@airbyte.io>
Co-authored-by: Octavia Squidington III <octavia-squidington-iii@users.noreply.github.com>
Co-authored-by: octavia-bot[bot] <108746235+octavia-bot[bot]@users.noreply.github.com>

Author: 4 people

airbyte-integrations/connectors/destination-motherduck/metadata.yaml

@@ -4,7 +4,7 @@ data:
   connectorSubtype: database
   connectorType: destination
   definitionId: 042ee9b5-eb98-4e99-a4e5-3f0d573bee66
-  dockerImageTag: 0.1.19
+  dockerImageTag: 0.1.20
   dockerRepository: airbyte/destination-motherduck
   githubIssueLabel: destination-motherduck
   icon: duckdb.svg