fix build: update connector command worker output usage in tests

[pedroslopez]

What

#14715 changed the output type of our connector command workers to be ConnectorJobOutput, which broke the Connectors Base / standard-source-test / standard-destination-test build (see failure example here)

How

Fix the build by considering this new output and getting the right type from it for each job.

[pedroslopez]

/test connector=connectors/destination-mysql

🕑 connectors/destination-mysql https://github.com/airbytehq/airbyte/actions/runs/2701281639
❌ connectors/destination-mysql https://github.com/airbytehq/airbyte/actions/runs/2701281639
🐛 https://gradle.com/s/dizuukk4ti6k2

Build Failed

Test summary info:

Could not find result summary

[pedroslopez]

/test connector=connectors/source-postgres

🕑 connectors/source-postgres https://github.com/airbytehq/airbyte/actions/runs/2701288767
✅ connectors/source-postgres https://github.com/airbytehq/airbyte/actions/runs/2701288767
No Python unittests run

Build Passed

Test summary info:

All Passed

[pedroslopez]

/test connector=connectors/destination-mysql

🕑 connectors/destination-mysql https://github.com/airbytehq/airbyte/actions/runs/2701483379
✅ connectors/destination-mysql https://github.com/airbytehq/airbyte/actions/runs/2701483379
Python tests coverage:

Name                                                              Stmts   Miss  Cover
-------------------------------------------------------------------------------------
normalization/transform_config/__init__.py                            2      0   100%
normalization/transform_catalog/reserved_keywords.py                 13      0   100%
normalization/transform_catalog/__init__.py                           2      0   100%
normalization/destination_type.py                                    13      0   100%
normalization/__init__.py                                             4      0   100%
normalization/transform_catalog/destination_name_transformer.py     155      8    95%
normalization/transform_catalog/table_name_registry.py              174     34    80%
normalization/transform_config/transform.py                         162     34    79%
normalization/transform_catalog/utils.py                             38      9    76%
normalization/transform_catalog/dbt_macro.py                         22      7    68%
normalization/transform_catalog/catalog_processor.py                147     80    46%
normalization/transform_catalog/transform.py                         61     38    38%
normalization/transform_catalog/stream_processor.py                 570    377    34%
-------------------------------------------------------------------------------------
TOTAL                                                              1363    587    57%

Build Passed

Test summary info:

All Passed

[edgao]

Lgtm, MySQL test failure looks unrelated but probably worth waiting for test rerun just in case