Prevent root from being recreated on react 18 (recreation of #1305) #563

Job	Run time
check_react_and_ujs (2.7)	31s
test (npm, npm, 2.7, base)	1m 0s
test (npm, npm, 2.7, shakapacker)	2m 28s
test (npm, npm, 2.7, sprockets_3)	1m 17s
test (npm, npm, 2.7, sprockets_4)	1m 37s
test (yarn_classic, yarn, 2.7, base)	1m 3s
test (yarn_classic, yarn, 2.7, shakapacker)	3m 36s
test (yarn_classic, yarn, 2.7, sprockets_3)	1m 42s
test (yarn_classic, yarn, 2.7, sprockets_4)	2m 35s
test (pnpm, pnpm, 2.7, base)	1m 8s
test (pnpm, pnpm, 2.7, shakapacker)	3m 36s
test (pnpm, pnpm, 2.7, sprockets_3)	1m 16s
test (pnpm, pnpm, 2.7, sprockets_4)	1m 19s
test (bun, bun, 2.7, base)	1m 10s
test (bun, bun, 2.7, shakapacker)	1m 55s
test (bun, bun, 2.7, sprockets_3)	1m 15s
test (bun, bun, 2.7, sprockets_4)	1m 24s
	28m 52s

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