Add connection to ScalarDB and parse keys

[ypeckstadt]

Description

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Related issues and/or PRs

This PR depends on the following PRs and should be reviewed and merged after:

• Add mockito and core project in Gradle files #1769
  • Move ColumnKeyValue to the data loader core project #1770
    • Add data loader core key and column utils #1771
      • Add TableMetadataService and utils #1772

Changes made

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Checklist

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• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

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Release notes

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Added validation for the Consensus Commit mutation operation.