feat: add PlatformImpl trait for custom platform callbacks #7097

Job	Run time
asan aarch64-apple-darwin	14m 45s
release aarch64-pc-windows-msvc	10m 40s
debug x86_64-apple-darwin	17m 59s
debug aarch64-apple-darwin	16m 19s
debug aarch64-apple-darwin ptrcomp	14m 2s
release x86_64-apple-darwin ptrcomp	12m 31s
release x86_64-unknown-linux-gnu	8m 6s
release x86_64-apple-darwin	11m 55s
release aarch64-apple-darwin	11m 48s
debug aarch64-unknown-linux-gnu	28m 7s
debug x86_64-unknown-linux-gnu ptrcomp	14m 42s
debug x86_64-apple-darwin ptrcomp	16m 40s
release x86_64-pc-windows-msvc	10m 7s
release aarch64-unknown-linux-gnu	14m 55s
release aarch64-apple-darwin ptrcomp	12m 32s
debug x86_64-unknown-linux-gnu	14m 43s
release x86_64-unknown-linux-gnu ptrcomp	8m 8s
test aarch64-pc-windows-msvc	4m 31s
publish	0s
	4h 2m 30s

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