### Description
Update all other connectors to use the new downstream architecture that
was recently introduced for the s3 connector.
Closes#1313 and #1311
The CustomError that we use to wrap custom ingest errors inherits from
BaseException rather than Exception (as we should, per specification
[here](https://docs.python.org/3/library/exceptions.html#BaseException)).
This resulted in exceptions not properly raising as expected. This PR
changes the inheritance which resolves the known issue.
Additionally, our base definition for get_file on IngestDoc was wrapped
with SourceConnectionError, however this must be explicitly decorating
each subclass definition in order to function. This PR does that.
## Testing
Some unit test coverage was added for the error wrapping class, however
this wasn't properly recreating the issue we are seeing when running
ingest tests.
To recreate that issue one can intentionally raise an exception in the
[partition_file](https://github.com/Unstructured-IO/unstructured/blob/main/unstructured/ingest/interfaces.py#L214C9-L214C23)
definition and then run any ingest test. Prior to this change: the code
and logs suggest that everything ran without exception, but the
partitioned output was not generated (as a result the test will fail
without any clues as to what went wrong). With this update, the expected
custom partition error, error message, and stack trace will be visible.
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Co-authored-by: Ahmet Melek <39141206+ahmetmeleq@users.noreply.github.com>
