Cleaner macros utilizing syn::Member #59128

Job	Run time
miri	12m 41s
ci	2m 48s
build (windows-latest)	12m 48s
build (ubuntu-latest)	6m 25s
check-bevy-internal-imports	4s
check-doc	11m 54s
build (macos-latest)	5m 45s
check-missing-examples-in-docs	25s
toml	1m 51s
typos	6s
check-missing-features-in-docs	26s
markdownlint	1m 5s
check-compiles	8m 43s
check-compiles-no-std-portable-atomic	1m 0s
check-compiles-no-std	51s
build-wasm-atomics	1m 45s
msrv	1m 49s
build-wasm	1m 39s
	1h 12m 5s

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