[CORE-4204] schema_registry: Improve handling of Accept and Content-Type

[BenPope]

Improve handling of Accept and Content-Type

Backports Required

• [ ] none - not a bug fix
• [ ] none - this is a backport
• [ ] none - issue does not exist in previous branches
• [ ] none - papercut/not impactful enough to backport
• [x] v24.1.x
• [x] v23.3.x
• [ ] v23.2.x

Release Notes

Improvements

• Schema Registry: Improve handling of Accept and Content-Type

[BenPope]

CI Failures are:

• https://github.com/redpanda-data/redpanda/issues/18014
• https://github.com/redpanda-data/redpanda/issues/19870

[BenPope]

lgtm - the ticket also mentions that the delete_config_subject handler should respond with a put_config_req_rep instead of a get_config_req_rep. Did you want to do that as part of this PR as well?

That would make the result incompatible. Their documentation is incorrect.

[BenPope]

lgtm - the ticket also mentions that the delete_config_subject handler should respond with a put_config_req_rep instead of a get_config_req_rep. Did you want to do that as part of this PR as well?

That would make the result incompatible. Their documentation is incorrect.

Oh, I see. Yes, that should be changed.

[BenPope]

[force-push]

• Bump the version
• fix the swagger response type for delete

[force-push]

• Rebase (to avoid a failing unit test)

[BenPope]

CI Failures (all unrelated):

• https://github.com/redpanda-data/redpanda/issues/19322
• Unrelated Redpanda service docker-rp-5 failed to start within 20 sec in rptest.tests.controller_erase_test.ControllerEraseTest.test_erase_controller_log.partial=False - there are many of these, not going to open a new one.
• test_moves_with_local_retention - node 5 disk usage should be withing the range (339738624.0, 415236096.00000006). Current value: 0.0 (not found - where's pandatriage?)

[vbotbuildovich]

/backport v24.1.x

[vbotbuildovich]

/backport v23.3.x