[GSK-3568] Remove legacy hub mentions from docs

[henchaves]

Description

Related Issue

Type of Change

• [x] 📚 Examples / docs / tutorials / dependencies update
• [ ] 🔧 Bug fix (non-breaking change which fixes an issue)
• [ ] 🥂 Improvement (non-breaking change which improves an existing feature)
• [ ] 🚀 New feature (non-breaking change which adds functionality)
• [ ] 💥 Breaking change (fix or feature that would cause existing functionality to change)
• [ ] 🔐 Security fix

Checklist

• [ ] I've read the CODE_OF_CONDUCT.md document.
• [ ] I've read the CONTRIBUTING.md guide.
• [ ] I've written tests for all new methods and classes that I created.
• [ ] I've written the docstring in Google format for all the methods and classes that I used.
• [ ] I've updated the pdm.lock running pdm update-lock (only applicable when pyproject.toml has been modified)

[linear[bot]]

GSK-3568 Remove all mentions to Legacy Hub on `giskard` docs/API

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud

[sonarcloud[bot]]

Please retry analysis of this Pull-Request directly on SonarCloud