feat: gql - use explicitly defined fields for queries instead of default objects

[ruslan-sh-r]

In case no fields specified for the query return nothing instead of using default field list.

Example with default fields list: https://github.com/NibiruChain/ts-sdk/blob/dabe094fcaafaf5c23668616e10905c960832347/src/gql/query/oracle.ts#L59-L68