Improve tracing layer customization #41703

Job	Run time
build (windows-latest)	4m 13s
check-bevy-internal-imports	5s
build (ubuntu-latest)	2m 6s
check-doc	8m 9s
build (macos-latest)	1m 32s
check-missing-examples-in-docs	30s
ci	2m 1s
miri	7m 5s
run-examples-macos-metal	5m 1s
toml	1m 59s
typos	8s
check-cfg	1m 36s
check-missing-features-in-docs	30s
markdownlint	7m 20s
check-compiles	4m 3s
msrv	1m 0s
build-wasm-atomics	1m 14s
build-wasm	45s
	49m 17s

Provide feedback