Searchblitz: add query for a simple, literal `and`

Created by: camdencheek

Our searchblitz query exercising and queries right now is a fairly complex query with 4 terms and somewhat expensive regexes (\b). To reflect the simplest use of and to better measure the base overhead of an and query, this adds the and_literal_simple query. This uses the same query string as or_literal_simple (replacing or with and) so they can be directly compared.

Test plan

Just updating searchblitz config.