Prevent root from being recreated on react 18 (recreation of #1305) #569

Job	Run time
check_react_and_ujs (2.7)	32s
test (npm, npm, 2.7, base)	1m 7s
test (npm, npm, 2.7, shakapacker)	7m 27s
test (npm, npm, 2.7, sprockets_3)	1m 18s
test (npm, npm, 2.7, sprockets_4)	11m 16s
test (yarn_classic, yarn, 2.7, base)	1m 0s
test (yarn_classic, yarn, 2.7, shakapacker)	1m 59s
test (yarn_classic, yarn, 2.7, sprockets_3)	1m 36s
test (yarn_classic, yarn, 2.7, sprockets_4)	11m 23s
test (pnpm, pnpm, 2.7, base)	57s
test (pnpm, pnpm, 2.7, shakapacker)	7m 33s
test (pnpm, pnpm, 2.7, sprockets_3)	1m 26s
test (pnpm, pnpm, 2.7, sprockets_4)	11m 14s
test (bun, bun, 2.7, base)	51s
test (bun, bun, 2.7, shakapacker)	2m 4s
test (bun, bun, 2.7, sprockets_3)	1m 33s
test (bun, bun, 2.7, sprockets_4)	1m 28s
	1h 4m 44s

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