Export font families and font faces post on site export #2951

Job	Run time
Core running from build / Core running from build / Linux	2m 9s
Core running from src / Core running from src / Linux	1m 57s
Core running from build / Core running from build / Windows	4m 32s
Core running from src / Core running from src / Windows	3m 46s
Core running from build / Core running from build / MacOS	3m 2s
Core running from src / Core running from src / MacOS	3m 14s
Gutenberg running from build / Gutenberg running from build / Linux	8m 15s
Gutenberg running from src / Gutenberg running from src / Linux	7m 55s
Gutenberg running from build / Gutenberg running from build / Windows	11m 57s
Gutenberg running from src / Gutenberg running from src / Windows	11m 32s
Gutenberg running from build / Gutenberg running from build / MacOS	14m 53s
Gutenberg running from src / Gutenberg running from src / MacOS	20m 20s
Leave WordPress Playground details	3s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 33m 35s

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