fix(rsc): fix FOUC of lazy component css within client boundary #546

Job	Run time
test	25s
test-rsc (macos-latest / chromium)	2m 21s
test-rsc (ubuntu-latest / firefox)	3m 43s
test-rsc (macos-latest / webkit)	3m 14s
test-rsc (windows-latest / chromium)	4m 39s
test-rsc (ubuntu-latest / chromium) (react-experimental)	2m 57s
test-rsc (ubuntu-latest / chromium) (rolldown)	2m 23s
test-rsc (ubuntu-latest / chromium)	2m 50s
test-rsc (ubuntu-latest / chromium) (react-canary)	2m 47s
	25m 19s

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