Add links to relevant issues/PRs for failing protocol tests (#1895)

* Add links to relevant issues/PRs for failing tests

* Update codegen-server/src/main/kotlin/software/amazon/smithy/rust/codegen/server/smithy/generators/protocol/ServerProtocolTestGenerator.kt

Co-authored-by: david-perez <d@vidp.dev>

* Format comment better

* Remove `RestJsonStreamingTraitsRequireLengthWithBlob` from failing tests

This test actually passes fine, but is not relevant for the server.

* Add comment about `RestJsonHttpResponseCodeDefaultsToModeledCode`

Co-authored-by: david-perez <d@vidp.dev>