Blocks/refactor twentytwentyone block processor (take 2) #24014

Job	Run time
Core running from src / MacOS	3m 41s
Core running from build / Linux	3m 37s
Core running from src / Linux	3m 16s
Core running from build / MacOS	3m 40s
Core running from build / Windows	3m 26s
Core running from src / Windows	3m 25s
Slack Notifications	0s
Failed workflow tasks	1s
	21m 6s

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