feat: add PlatformImpl trait for custom platform callbacks #7095

Job	Run time
release aarch64-pc-windows-msvc	11m 57s
asan aarch64-apple-darwin	14m 50s
release x86_64-unknown-linux-gnu ptrcomp	8m 16s
debug x86_64-apple-darwin	18m 11s
debug aarch64-apple-darwin ptrcomp	14m 27s
debug x86_64-unknown-linux-gnu	14m 36s
release aarch64-apple-darwin ptrcomp	11m 33s
release x86_64-apple-darwin	12m 4s
release x86_64-unknown-linux-gnu	8m 15s
debug aarch64-apple-darwin	14m 14s
release aarch64-apple-darwin	12m 36s
debug x86_64-apple-darwin ptrcomp	19m 31s
release x86_64-pc-windows-msvc	8m 49s
debug aarch64-unknown-linux-gnu	28m 58s
release aarch64-unknown-linux-gnu	15m 1s
debug x86_64-unknown-linux-gnu ptrcomp	14m 59s
release x86_64-apple-darwin ptrcomp	11m 47s
test aarch64-pc-windows-msvc	5m 36s
publish	-1s
	4h 5m 39s

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