feat: change dataset publish validation to have at least one question (required or not)

[jfcalvo]

Description

This PR includes changes aligning validations for publishing datasets so a dataset can be published with at least one question (being required or not). The same that we were doing before with fields.

Refs https://github.com/argilla-io/roadmap/issues/21

Type of change

• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested

• [x] Modifying tests but we should do additional manual testing.

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
• I confirm My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• I have added relevant notes to the CHANGELOG.md file (See https://keepachangelog.com/)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.20%. Comparing base (16cbc35) to head (6c478cc). Report is 42 commits behind head on feat/argilla-direct-feature-branch.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feat/argilla-direct-feature-branch #5588 +/- ## =================================================================== Coverage 91.20% 91.20% =================================================================== Files 145 145 Lines 6026 6026 =================================================================== Hits 5496 5496 Misses 530 530 ``` | [Flag](https://app.codecov.io/gh/argilla-io/argilla/pull/5588/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io) | Coverage Δ | | |---|---|---| | [argilla-server](https://app.codecov.io/gh/argilla-io/argilla/pull/5588/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io) | `91.20% <100.00%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=argilla-io#carryforward-flags-in-the-pull-request-comment) to find out more.

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[frascuchon]

We can close this one @jfcalvo