flow: x-schema-name annotation for 2nd-to-last resource path

[mdibaiee]

Description:

• Sets the base for supporting threading through of the schema name from the second-to-last part of collection name
• Added tests for both cases (stub config) and sourceCapture

Workflow steps:

Documentation links affected:

(list any documentation links that you created, or existing ones that you've identified as needing updates, along with a brief description)

Notes for reviewers:

(anything that might help someone review this PR)

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This change is 

[psFried]

I think this is looking directionally right. I left some inline comments, and just wanted to add a general request to rename any collection_name or task_name variables that aren't valid catalog names, since I didn't leave separate comments on each one.

[psFried]

Left a few more comments, but I think this is getting pretty close.

[psFried]

The remaining issue that I'm seeing is just how to handle the possibility of mismatch between the target_schema and delta_updates fields on the materialization spec, and the resource spec schema of the materialization connector. To me, it seems worth validating that the connector actually has the necessary annotations on the resource spec schema. But it might be worth discussing as others may disagree.

[psFried]

Left a few more comments/questions

[psFried]

LGTM