feat(schema-compiler): Add support for time dimensions with granularities in multi-stage measures add_group_by

[KSDaemon]

With this fix you can reference time dimension granularity within add_group_by property of multi-stage measure.

      - name: xirr
        multi_stage: true
        sql: "XIRR({total_payments}, {created_at.day})"
        type: number_agg
        add_group_by:
          - created_at.day   # here day is a granularity of created_at dimension

Check List

• Tests have been run in packages where changes made if available
• Linter has been run for changed code
• Tests for the changes have been added if not covered yet
• Docs have been added / updated if required