dynamic_modules: adds send response

[bplotnick]

Commit Message: Add envoy_dynamic_module_callback_http_send_response to the dynamic modules ABI and rust SDK
Additional Description: This adds the ability to send a local response back. I've also fixed up abi_impl_test.cc. Before, it was not asserting on the correct headers. Now i've moved to parameterized tests so we can assert on the correct headers and also split out the tests into smaller units.
Risk Level: low
Testing: unit tests
Docs Changes:
Release Notes:
Platform Specific Features:

[repokitteh-read-only]

As a reminder, PRs marked as draft will not be automatically assigned reviewers,
or be handled by maintainer-oncall triage.

Please mark your PR as ready when you want it to be reviewed!

🐱

Caused by: #37856 was opened by bplotnick.

see: more, trace.

[bplotnick]

@mathetake I took your send response impl from your PoC and ported it here. I haven't yet tested this with my module (hence why the PR is in draft). But i wanted to post the PR so you could take an early look if you wanted to

[mathetake]

thank you for taking a shot at this - i left a coupe of comments. Mainly I do not want to bring in a third party dependency in the core API layer.

[mathetake]

thank you for fixing up the unit tests btw!

[mathetake]

Looks good to me, thank you for your work. deferring to @mattklein123 for the rest