Nested xml map with xml name

[peterrsongg]

Background

• What do these changes do?
  Adds a protocol test for the restXml protocol for unmarshalling a response that contains a nested xml map with the @xmlName trait applied to both key and value pairs

• Why are they important?
  While implementing other protocol tests we realized that this was a gap in our generator, but it was hard to fix without an existing protocol test. This drives TDD for us.

Testing

• How did you test these changes?

./gradlew :smithy-aws-protocol-tests:build 
PS C:\Dev\Repos\smithy-fork> ./gradlew :smithy-aws-protocol-tests:build
Picked up JAVA_TOOL_OPTIONS: -Dlog4j2.formatMsgNoLookups=true

> Configure project :
Smithy version: '1.47.0'

> Task :smithy-validation-model:smithyFormat
Running smithy format

> Task :smithy-aws-protocol-tests:smithyBuild
Running smithy build
SUCCESS: Validated 2831 shapes

Validated model, now starting projections...

ΓöÇΓöÇ  source  ΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇΓöÇ
Completed projection source (2831): C:\Dev\Repos\smithy-fork\smithy-aws-protocol-tests\build\smithyprojections\smithy-aws-protocol-tests\source

Summary: Smithy built 1 projection(s), 3 plugin(s), and 134 artifacts

> Task :smithy-aws-protocol-tests:smithyJarValidate
Running smithy validate
SUCCESS: Validated 2831 shapes


Deprecated Gradle features were used in this build, making it incompatible with Gradle 9.0.

You can use '--warning-mode all' to show the individual deprecation warnings and determine if they come from your own scripts or plugins.

For more on this, please refer to https://docs.gradle.org/8.6/userguide/command_line_interface.html#sec:command_line_warnings in the Gradle documentation.

BUILD SUCCESSFUL in 4s
36 actionable tasks: 8 executed, 28 up-to-date

Links

• Links to additional context, if necessary
• Issue #, if applicable (see here for a list of keywords to use for linking issues)

---

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[kstich]

Will run tests in an additional client after the request test is added.

[kstich]

Should have an @httpRequestTests application as well.

[peterrsongg]

Added the request test