* rename Query.build -> Query.parse_and_build
* rename two test files and move 4 %Query{} building functions into subfolder
* rename StatsAPIFilterParser to LegacyStatsAPIFilterParser
* rename Filters.QueryParser to QueryParser
* turn QueryParserTest into QueryParseAndBuildTest
* move query_parser.ex out of filters directory
* separate build from parse
* disable sample_threshold in the new intermediate build function, for now
* remove now redundant test util functions
* remove unused import
* address todo from earlier
* credo
* Make module names in sync with paths in tests
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Co-authored-by: Adrian Gruntkowski <adrian.gruntkowski@gmail.com>