[AI-FSSDK] [FSSDK-12369] Add local holdouts support to JavaScript SDK #1571

Job	Run time
browser_tests (safari)	9m 5s
browser_tests (firefox)	12m 10s
unit_tests (22)	1m 42s
unit_tests (20)	1m 52s
unit_tests (24)	1m 32s
browser_tests (chrome)	11m 47s
integration_tests / test	8s
fullstack_production_suite / test	5s
lint_markdown_files / lint	1m 16s
typescript_test	1m 51s
unit_tests (18)	1m 45s
browser_tests (edge)	8m 50s
lint	58s
Coveralls coverage	6s
	53m 7s

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