Undeprecate is_playing_animation #51703

Job	Run time
toml	1m 57s
miri	12m 18s
build (windows-latest)	5m 48s
ci	2m 48s
build (ubuntu-latest)	2m 47s
typos	6s
build (macos-latest)	2m 1s
check-bevy-internal-imports	5s
check-missing-examples-in-docs	31s
check-doc	8m 38s
run-examples-macos-metal	5m 39s
check-missing-features-in-docs	29s
markdownlint	1m 11s
check-compiles	4m 44s
check-compiles-no-std	24s
build-wasm	52s
msrv	1m 5s
build-wasm-atomics	1m 33s
	52m 56s

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