feat: Add grant privileges to database role to SDK (#2023)

* Extract grants validations and fix them

* Extract grants impl

* Adjust grants to interface

* Use helper methods for grants

* Add grant privileges to database role (WIP)

* Add validations to grant privileges to database role (WIP)

* Add implementation to grant privileges to database role (WIP)

* Use common assertions in grants tests

* Add unit tests for grant privileges to database role (WIP)

* Test granting privileges to database role

* Search for privilege in tests

* Revoke grant from database role

* Assert database privilege

* Add validation tests to grants for database role

* Refactor validation tests for grants

* Add validation tests for revoking database role privileges

* Fix linter comment

* Fix test

* Fix after review