Feat: add addressing style config for S3-compatible storage (#11510)

### Type of change
* [x]  New Feature (non-breaking change which adds functionality)


Add support for Virtual Hosted Style and Path Style URL addressing in
S3_COMPATIBLE storage connector. Default to Virtual Hosted Style for
better compatibility with COS and other S3-compatible services.

- Add addressing_style field to credentials (virtual/path)
- Update frontend form with selection dropdown
- Add validation and tooltips for S3 Compatible endpoint URL

<img width="703" height="875" alt="image"
src="https://github.com/user-attachments/assets/af5ba7ca-f160-47fa-8ba1-32eace8f5fdf"
/>

<img width="1620" height="788" alt="image"
src="https://github.com/user-attachments/assets/6012b5ce-8bcb-478e-a9cb-425f886d5046"
/>

---------

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

common/data_source/blob_connector.py

@@ -90,7 +90,7 @@ class BlobStorageConnector(LoadConnector, PollConnector):
         elif self.bucket_type == BlobType.S3_COMPATIBLE:
             if not all(
                 credentials.get(key)
-                for key in ["endpoint_url", "aws_access_key_id", "aws_secret_access_key"]
+                for key in ["endpoint_url", "aws_access_key_id", "aws_secret_access_key", "addressing_style"]
             ):
                 raise ConnectorMissingCredentialError("S3 Compatible Storage")