fix(job_attachments): include file path in error message for upload failures

[gahyusuh]

- Added file path in custom error messages when multipart uploads fail due to a ClientError.
- Corrected indentation in existing unit tests for error message verification (in test_download.py).

What was the problem/requirement? (What/Why)

Previously, when multipart upload failed, the custom error message (in the JobAttachmentsS3ClientError) did not provide an info of which file had failed to upload. This lack of detail made debugging more difficult.

What was the solution? (How)

This PR has the following changes:

• Enhanced the error messages to include the file path when multipart uploads fail. The updated error message looks like below:

  Error uploading file in bucket 'test-bucket', Target key or prefix: 'test_key', HTTP Status Code: 400,  An error occurred (InvalidPart) when calling the UploadPart operation: Invalid Part (Failed to upload /tmp/pytest-of-gahyusuh/pytest-4555/popen-gw7/test_upload_error_message0/test_file.txt)
  

• Fixed some existing unit tests in test_download.py to have correct indentation, ensuring that the assertions for verifying error messages are properly executed.

What is the impact of this change?

Provide clearer context for debugging, helping users to identify the file in question and address issues with file uploads.

How was this change tested?

• Added a new unit test test_upload_file_to_s3_upload_part_failure to verify that the error message includes the file path during a failed upload.
• Ran hatch run test, ensuring that the corrected unit tests are properly executed and all tests successfully passed.
• Checked that job submission with some job attachments was working.

Was this change documented?

No.

Is this a breaking change?

No.