Switched to ClientError exception in AWS S3 Credentials Setting (#251)

This PR is for this bug:
https://linear.app/deepchecks/issue/MON-2399/aws-s3-connection-status-is-wrong
Switching to ClientError seems to catch credential error.


<img width="631" alt="Screenshot 2023-06-12 at 15 46 36"
src="https://github.com/deepchecks/monitoring/assets/3765399/58ebd08f-10ea-4770-bed6-4d7bf0c21e0f">

---------

Co-authored-by: Jonathan Liberman <[email protected]>

Author: shayts7

backend/deepchecks_monitoring/ee/api/v1/data_sources.py

@@ -13,7 +13,7 @@
 import boto3
 import sqlalchemy as sa
 from botocore.config import Config
-from botocore.exceptions import BotoCoreError
+from botocore.exceptions import BotoCoreError, ClientError
 from fastapi import Depends, Response
 from pydantic.main import BaseModel
 from sqlalchemy.ext.asyncio import AsyncSession
@@ -74,7 +74,7 @@ async def new_data_source(body: DataSourceCreationSchema,
                 config=Config(region_name=data_source.parameters['region'])
             )
             sts.get_caller_identity()
-        except BotoCoreError as e:
+        except (BotoCoreError, ClientError) as e:
             raise BadRequest('Invalid credentials to AWS') from e
     else:
         raise BadRequest('Invalid data source type')