[low-code connectors] Get parent stream's full slice

[girarda]

What

The substream slicer currently sets the slice's parent_slice field to the value of the slice field in the parent stream's slice.
This is wrong as there are no guarantees that the parent stream slices have a slice field.
The Substream slicer should instead store the fill parent slice in the parent_slice field.

Example of what this will look like:

{"type": "DEBUG", "message": "Processing stream slice", "data": {"slice": "{'parent_id': 19214950003, 'parent_slice': {'start_time': '2020-01-01T00:00:00.000000+0000', 'end_time': '2022-08-17T22:15:45.977826+0000'}}"}}

I noticed this issue while trying to add incremental support to the greenhouse connector. Nothing in production is currently affected.

How

• Set the parent_slice to the full parent slice instead of only its "slice" field
• Update tests

Recommended reading order

1. airbyte-cdk/python/airbyte_cdk/sources/declarative/stream_slicers/substream_slicer.py
2. airbyte-cdk/python/unit_tests/sources/declarative/stream_slicers/test_substream_slicer.py

🚨 User Impact 🚨

Are there any breaking changes? What is the end result perceived by the user? If yes, please merge this PR with the 🚨🚨 emoji so changelog authors can further highlight this if needed.

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[girarda]

this is a problem for sub-resources with an incremental parent stream.
this bug sneaked in during the stream slicer refactor because the parent stream slices have a "slice" field in the tests https://github.com/airbytehq/airbyte/pull/15631/files#diff-e46344fad49c4a5f8e385cf45a805d7117107c4b0e1b806720a7416cf397e853L16-L17

[brianjlai]

lgtm. thanks for adding some tweaking the tests to cover this now!

[girarda]

/publish-cdk dry-run=false

🕑 https://github.com/airbytehq/airbyte/actions/runs/2879225027
✅ https://github.com/airbytehq/airbyte/actions/runs/2879225027