[FEATURE-BRANCH] v2.0.0 changes

[jfcalvo]

Description

This PR includes all the changes related with new Argilla v2.0.0.

Type of change

(Please delete options that are not relevant. Remember to title the PR according to the type of change)

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (change restructuring the codebase without changing functionality)
• [ ] Improvement (change adding some improvement to an existing functionality)
• [ ] Documentation update

How Has This Been Tested

(Please describe the tests that you ran to verify your changes. And ideally, reference tests)

• [x] Adding new tests.

Checklist

• [ ] I added relevant documentation
• [ ] follows 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/)

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Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Closes #<issue_number>

Type of change

(Please delete options that are not relevant. Remember to title the PR according to the type of change)

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Refactor (change restructuring the codebase without changing functionality)
• [ ] Improvement (change adding some improvement to an existing functionality)
• [ ] Documentation update

How Has This Been Tested

(Please describe the tests that you ran to verify your changes. And ideally, reference tests)

• [ ] Test A
• [ ] Test B

Checklist

• [ ] I added relevant documentation
• [ ] follows 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/)