[FSSDK-10985] Implement log message file generator #921

Job	Run time
crossbrowser_and_umd_unit_tests	6h 0m 14s
lint	58s
unit_tests (16)	1m 39s
unit_tests (18)	1m 34s
unit_tests (20)	1m 30s
unit_tests (22)	1m 28s
fullstack_production_suite / test	4s
integration_tests / test	6s
lint_markdown_files / lint	1m 5s
Coveralls coverage	2s
	6h 8m 40s

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