Layout behavior change #8111

Job	Run time
benchmark	1m 37s
Test compatibility with Primer ViewComponents (main)	1m 22s
test (Rails 7.2, Ruby 3.3)	43s
test (Rails main, Ruby head)	45s
test (Rails 7.1, Ruby 3.2)	38s
test (Rails 8.0, Ruby 3.4)	38s
coverage	0s
	5m 43s

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