#2178 Added a new method CreateResponseWriter to UIResponseWriter

[terjew]

What this PR does / why we need it: Makes it possible for other projects to reuse UIResponseWriter even if they have other needs with regards to serialization options.

Which issue(s) this PR fixes: #2178

Special notes for your reviewer: Do I need to document the functionality? A sample use case can be seen in the unit test.

All the tests from UI.Client and UI.Core run fine, which is what I would expect to be affected by the changes.

Many tests from other projects do not run successfully on my local setup, but that is also true before applying my changes. I assume I am missing some dependency, configuration or similar. It seems like there is a CI workflow to run tests in GitHub, but it is waiting for approval before it will run.

Does this PR introduce a user-facing change?: The proposed change should only affect library users, not end-users.

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [X] Code compiles correctly
• [X] Created/updated tests
• [X] Unit tests passing
• [X] End-to-end tests passing
• [ ] Extended the documentation
• [ ] Provided sample for the feature

[terjew]

@dotnet-policy-service agree

[terjew]

@Alirexaa how do I get a reviewer assigned to this?

[Alirexaa]

@Alirexaa how do I get a reviewer assigned to this?

Sorry. I'm not familiar with UI-related things.