UI Material: each material should have its own buffer (#10422) #250

Job	Run time
build (windows-latest)	9m 24s
build (ubuntu-latest)	2m 58s
check-bevy-internal-imports	4s
check-doc	7m 10s
build (macos-latest)	3m 30s
check-missing-examples-in-docs	34s
ci	3m 13s
miri	6m 11s
run-examples-on-windows-dx12	26m 43s
check-missing-features-in-docs	43s
markdownlint	1m 24s
check-compiles	3m 47s
build-wasm	2m 4s
msrv	3m 38s
	1h 11m 23s

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