fix(drive): internal error on querying specific identity keys

[markin-io]

Issue being fixed or feature implemented

Fixed "storage: grovedb: not supported: offset must not be set in query_raw_keys_optional" drive error when querying specific keys via identity/keys

What was done?

Provide offset: None in grove db query

How Has This Been Tested?

Tested locally by querying specific identity keys

Breaking Changes

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[QuantumExplorer]

I would have preferred that we error when we ask for specific keys with an offset, however this solution (discard the offset) is acceptable to me.