feat: add PlatformImpl trait for custom platform callbacks #7074

Job	Run time
asan aarch64-apple-darwin	14m 55s
release aarch64-pc-windows-msvc	11m 4s
debug x86_64-apple-darwin ptrcomp	2m 4s
release x86_64-apple-darwin	2m 10s
release aarch64-apple-darwin ptrcomp	2m 7s
debug x86_64-unknown-linux-gnu	2m 9s
debug aarch64-unknown-linux-gnu	2m 6s
release x86_64-apple-darwin ptrcomp	2m 5s
debug aarch64-apple-darwin ptrcomp	2m 5s
release x86_64-pc-windows-msvc	1s
debug aarch64-apple-darwin	1m 57s
debug x86_64-apple-darwin	2m 3s
release x86_64-unknown-linux-gnu ptrcomp	2m 12s
debug x86_64-unknown-linux-gnu ptrcomp	58s
release aarch64-unknown-linux-gnu	2m 0s
release x86_64-unknown-linux-gnu	1m 57s
release aarch64-apple-darwin	1m 57s
test aarch64-pc-windows-msvc	6m 16s
publish	0s
	1h 0m 6s

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