* Add functionality to record_is_deleted method as well as corresponding unit tests to reflect possible data scenarios
* Add unit tests for write_output_files method now that deleted records are properly processed
* Update aardvark_records fixtures to include deleted records

Why these changes are being introduced:
* OpenSearch can parse the WKT strings that are found in MITAardvark records so the values don't require the previously expected parsing.

How this addresses that need:
* Rename Location.geodata attribute to geoshape as well as update corresponding unit tests and fixtures
* Refactor get_locations method to store WKT strings as well as update corresponding unit tests and fixtures
* Remove parse_geodata_string from helpers.py and corresponding unit tests
* Add default kind value to get_identifiers method

Side effects of this change:
* None

Relevant ticket(s):
* https://mitlibraries.atlassian.net/browse/GDT-116

* Update aardvark fixtures
* Refactor record_is_deleted method and update corresponding unit test
* Update kind values for get_subjects method