Fix docstrings FBO Sphinx rendering.

Fixes #965.

Uses the already-existing resource path logic for autogen snippets.

Previous:
```py
    # Initialize request argument(s)
    request = asset_v1.DeleteFeedRequest(
        name="projects/{project}/feeds/{feed}",
    )
```

Now:
```py
    # Initialize request argument(s)
    project = "my-project-id"
    feed = "feed_value"
    name = f"projects/{project}/feeds/{feed}"

    request = asset_v1.DeleteFeedRequest(
        name=name,
    )
```

Note: The logic may result in multiple variables with the same name (it doesn't happen for any of the golden APIs, but might for an API with more required fields).

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

…is set (#965)

* docs: clarified where ordering_key will be written if write_metadata is set

PiperOrigin-RevId: 551210991

Source-Link: googleapis/googleapis@7c762d7

Source-Link: googleapis/googleapis-gen@15fe4c5
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMTVmZTRjNWZmNWViZDUyOTExYjQyOWIwNWI5OTJlMjMyZjUzMzUxZSJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Source-Link: googleapis/synthtool@909573c
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:ddf4551385d566771dc713090feb7b4c1164fb8a698fe52bbe7670b24236565b

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>