* wip. adding sprinkles fields.
* some refactoring. Works with sprinkles now.
* exclude top level dashboard hit fields from hit "fields"
* adds unit test for DecodeCell helper
* test can search for specific dashboard fields on bleve index
* adds search handler tests for the fields and tests for fields when transforming the search req to a bleve search req
* fix panic when calling fields.Set() with int32
* adds regression test
* remove unneeded method on test mock client
* fix linter issues
* updates dashboard test data for bleve tests
* remove DASHBOARD_LEGACY_ID from bleve_tests
* dont cast twice
* updates test to sort by dashboard_views_last_1_days
* declare excludedFields outside of function
* fixes sorting by dashboard fields - prepends "fields." to any dashboard fields we try to sort by
* uses map for excludedFields
* expects fields to be array-style url param
* change method name
* fixes failing tests - needed to add column type to mocks
