feat(PLU-354): remove connector config models from the SDK

Replace the typed unions in CreateSourceConnectorConfig,
CreateDestinationConnectorConfig, etc. with Dict[str, Any] and delete the
generated per-connector config models. New connector fields work without
an SDK upgrade.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: awalker4

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.44.0
+
+### Breaking changes
+* Removed deprecated connector config models from the SDK (e.g. `S3SourceConnectorConfig`, `AzureDestinationConnectorConfig`). Pass connector configs as plain dicts with arbitrary fields. The SDK is no longer coupled to backend connector schemas — new fields work without an SDK upgrade.
+
 ## 0.43.4
 
 ### Enhancements