[bevy_ui/layout] Update tests to get GlobalTransform properly #39738

Job	Run time
check-bevy-internal-imports	6s
build (windows-latest)	4m 43s
check-doc	7m 18s
check-cfg	1m 16s
check-missing-examples-in-docs	29s
ci	28s
build (ubuntu-latest)	2m 52s
miri	6m 4s
build (macos-latest)	6m 16s
run-examples-macos-metal	4m 20s
toml	2m 1s
typos	6s
check-compiles	0s
check-missing-features-in-docs	35s
markdownlint	1m 16s
build-wasm	1m 1s
msrv	1m 8s
build-wasm-atomics	1m 15s
	41m 14s

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