MutationState is not passed to C++ client for search operations

When a search_query is executed we first create a SearchQueryBuilder that is responsible for creating all the "parts" necessary to execute a search. When we go to actually execute the search would distill all the parameters for the search query into a dict(). As a part of that process we are mistakenly filtering out mutation_state rending RYOW operations to not be able to work with search queries.