[bevy_ui/layout] Update tests to get GlobalTransform properly #39743

Job	Run time
build (windows-latest)	4m 25s
check-doc	7m 31s
build (ubuntu-latest)	2m 33s
ci	2m 38s
build (macos-latest)	3m 29s
miri	6m 51s
run-examples-macos-metal	5m 12s
typos	4s
check-bevy-internal-imports	5s
toml	1m 58s
check-cfg	1m 36s
check-missing-examples-in-docs	27s
check-missing-features-in-docs	30s
markdownlint	1m 17s
check-compiles	3m 31s
build-wasm	1m 5s
msrv	1m 4s
build-wasm-atomics	1m 10s
	45m 26s

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