[FSSDK-12246] prepare release v6.3.1 #1530

Job	Run time
lint	1m 2s
unit_tests (22)	1m 33s
unit_tests (18)	1m 39s
unit_tests (20)	1m 33s
unit_tests (24)	1m 26s
browser_tests (firefox)	7m 11s
lint_markdown_files / lint	1m 14s
browser_tests (chrome)	7m 18s
browser_tests (edge)	6m 58s
fullstack_production_suite / test	6s
typescript_test	1m 29s
browser_tests (safari)	3m 11s
integration_tests / test	7s
Coveralls coverage	6s
	34m 53s

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