Backport: Templates perf: resolve patterns server side #5983

Job	Run time
Core running from build / Core running from build / MacOS	1m 54s
Core running from src / Core running from src / MacOS	2m 14s
Gutenberg running from build / Gutenberg running from build / Linux	9m 1s
Gutenberg running from src / Gutenberg running from src / Linux	9m 36s
Core running from src / Core running from src / Linux	1m 59s
Core running from build / Core running from build / Linux	2m 2s
Gutenberg running from build / Gutenberg running from build / Windows	12m 47s
Gutenberg running from src / Gutenberg running from src / Windows	12m 8s
Core running from build / Core running from build / Windows	4m 10s
Core running from src / Core running from src / Windows	4m 10s
Gutenberg running from build / Gutenberg running from build / MacOS	11m 6s
Gutenberg running from src / Gutenberg running from src / MacOS	7m 26s
Slack Notifications	0s
Failed workflow tasks	0s
	1h 18m 33s

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