[Task]: Modify the opensearch query builder to handle date ranges

[chouinar]

Summary

Update https://github.com/navapbc/simpler-grants-gov/blob/main/api/src/adapters/search/opensearch_query_builder.py to allow for us to pass in date fields with start/end values and handle converting to the proper opensearch request. A null start or end date should be considered valid (and treated as open-ended). We should treat dates as inclusive (so gte instead of gt).

See: https://opensearch.org/docs/latest/query-dsl/term/range/#date-fields for details on how to construct these queries.

I suggest you add dates to the test data in https://github.com/navapbc/simpler-grants-gov/blob/main/api/tests/src/adapters/search/test_opensearch_query_builder.py in order to test this easily.

Acceptance criteria

• Query builder updated to support date ranges
• Tests updated to test this behavior

[acouch]

Issue migrated to hhs/simpler-grants-gov#2043

[acouch]

Issue migrated to hhs/simpler-grants-gov#2044