Differentiate server serde

[JordonPhillips]

This adds differentation for empty body behavior in restJson1. For
responses this protocol requires always sending an empty json object
if there is some shape defined as output but nothing bound to the
body or payload.

Additional context

depends on: smithy-lang/smithy-typescript#305

---

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[aws-sdk-js-automation]

AWS CodeBuild CI Report

• CodeBuild project: sdk-staging-test
• Commit ID: f43b0a2
• Result: SUCCEEDED
• Build Logs (available for 30 days)

Powered by github-codebuild-logs, available on the AWS Serverless Application Repository

[adamthom-amzn]

Don't know how I overlooked this PR.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@f164177). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head b37a3e1 differs from pull request most recent head be97d8e. Consider uploading reports for the commit be97d8e to get more accurate results

@@           Coverage Diff           @@
##             main    #2220   +/-   ##
=======================================
  Coverage        ?   60.09%           
=======================================
  Files           ?      472           
  Lines           ?    24862           
  Branches        ?     5887           
=======================================
  Hits            ?    14941           
  Misses          ?     9921           
  Partials        ?        0           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f164177...be97d8e. Read the comment docs.

[github-actions]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs and link to relevant comments in this thread.