feat: update update_response endpoint to replace values

[gabrielmbmb]

Description

After discussing with @damianpumar, we both agreed to update the PUT /api/v1/responses/{response_id} endpoint to behave like a real PUT endpoint replacing the values stored in the database with the values received in the request.

Therefore, this PR updates the PUT /api/v1/responses/{response_id} endpoint to do a complete update of the Response.values (replace the dict), as before the endpoint was behaving like a PATCH endpoint. In addition, the PR updates the validation of the responses given for the RankingQuestion when the status!=submitted allowing the following response to be valid (missing rank in some options, which means the user has not ranked this options yet):

{
    "values": {
        "ranking": {
            "value": [
                {"value": "option-a", "rank": 1},
                {"value": "option-b", "rank": 2},
                {"value": "option-c"},
                {"value": "option-d"}
            ]
        }
    },
    "status": "draft"
}

Type of change

• New feature (non-breaking change which adds functionality)

How Has This Been Tested

In a local development environment:

• Sending a request to PUT /api/v1/responses/{response_id} updates the response for a record (overwrites Response.values)
• Sending a request to PUT /api/v1/responses/{response_id} and the above JSON payload, the server accepts it and returns 200

Checklist

• I added relevant documentation
• I followed the style guidelines of this project
• I did a self-review of my code
• I made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I filled out the contributor form (see text above)
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov]

Codecov Report

Patch coverage is 100.00% of modified lines.

Files Changed	Coverage
src/argilla/server/contexts/datasets.py	ø
src/argilla/server/models/mixins.py	100.00%
src/argilla/server/models/questions.py	100.00%

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[github-actions]

The URL of the deployed environment for this PR is https://argilla-quickstart-pr-3711-ki24f765kq-no.a.run.app