feat: add PlatformImpl trait for custom platform callbacks #7079

Job	Run time
release aarch64-pc-windows-msvc	12m 12s
asan aarch64-apple-darwin	19m 11s
debug x86_64-apple-darwin ptrcomp	18m 1s
release aarch64-apple-darwin ptrcomp	14m 48s
debug aarch64-apple-darwin	13m 41s
release aarch64-apple-darwin	13m 2s
release x86_64-unknown-linux-gnu	8m 32s
release x86_64-apple-darwin	14m 16s
debug x86_64-unknown-linux-gnu ptrcomp	15m 40s
debug x86_64-unknown-linux-gnu	14m 33s
release x86_64-pc-windows-msvc	9m 39s
release x86_64-unknown-linux-gnu ptrcomp	8m 29s
release x86_64-apple-darwin ptrcomp	12m 23s
debug x86_64-apple-darwin	17m 44s
debug aarch64-apple-darwin ptrcomp	14m 19s
debug aarch64-unknown-linux-gnu	28m 31s
release aarch64-unknown-linux-gnu	15m 3s
test aarch64-pc-windows-msvc	4m 33s
publish	0s
	4h 14m 37s

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