Prevent root from being recreated on react 18 (recreation of #1305) #556

Job	Run time
check_react_and_ujs (2.7)	37s
test (npm, npm, 2.7, base)	59s
test (npm, npm, 2.7, shakapacker)	2m 18s
test (npm, npm, 2.7, sprockets_3)	1m 35s
test (npm, npm, 2.7, sprockets_4)	1m 24s
test (yarn_classic, yarn, 2.7, base)	1m 8s
test (yarn_classic, yarn, 2.7, shakapacker)	3m 14s
test (yarn_classic, yarn, 2.7, sprockets_3)	1m 28s
test (yarn_classic, yarn, 2.7, sprockets_4)	2m 26s
test (pnpm, pnpm, 2.7, base)	1m 3s
test (pnpm, pnpm, 2.7, shakapacker)	2m 1s
test (pnpm, pnpm, 2.7, sprockets_3)	2m 42s
test (pnpm, pnpm, 2.7, sprockets_4)	1m 28s
test (bun, bun, 2.7, base)	51s
test (bun, bun, 2.7, shakapacker)	1m 53s
test (bun, bun, 2.7, sprockets_3)	1m 25s
test (bun, bun, 2.7, sprockets_4)	1m 18s
	27m 50s

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