Rename `bevy_render::Color` to `LegacyColor` #37245

Job	Run time
build (windows-latest)	1m 44s
check-bevy-internal-imports	4s
check-doc	1m 0s
build (ubuntu-latest)	1m 41s
build (macos-latest)	1m 53s
check-missing-examples-in-docs	29s
ci	22s
miri	7m 38s
run-examples-on-windows-dx12	12m 10s
toml	2m 2s
check-compiles	0s
check-missing-features-in-docs	29s
markdownlint	1m 22s
build-wasm	0s
msrv	0s
	30m 54s

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