feat: add PlatformImpl trait for custom platform callbacks #7080

Job	Run time
release aarch64-pc-windows-msvc	10m 37s
asan aarch64-apple-darwin	20m 58s
release x86_64-unknown-linux-gnu	8m 31s
debug x86_64-apple-darwin ptrcomp	16m 22s
debug x86_64-apple-darwin	18m 8s
release x86_64-apple-darwin ptrcomp	13m 3s
release aarch64-apple-darwin ptrcomp	13m 14s
release x86_64-apple-darwin	14m 20s
debug aarch64-apple-darwin ptrcomp	15m 37s
debug x86_64-unknown-linux-gnu ptrcomp	15m 30s
release aarch64-apple-darwin	13m 33s
release x86_64-unknown-linux-gnu ptrcomp	7m 50s
release x86_64-pc-windows-msvc	9m 49s
debug x86_64-unknown-linux-gnu	14m 8s
release aarch64-unknown-linux-gnu	15m 25s
debug aarch64-apple-darwin	17m 58s
debug aarch64-unknown-linux-gnu	28m 0s
test aarch64-pc-windows-msvc	7m 43s
publish	0s
	4h 20m 46s

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