feat: add PlatformImpl trait for custom platform callbacks #7082

Job	Run time
asan aarch64-apple-darwin	14m 53s
release aarch64-pc-windows-msvc	12m 22s
debug x86_64-apple-darwin ptrcomp	2m 59s
debug x86_64-apple-darwin	2m 40s
debug aarch64-apple-darwin	2m 52s
release x86_64-unknown-linux-gnu ptrcomp	1m 59s
release x86_64-pc-windows-msvc	1m 45s
debug aarch64-unknown-linux-gnu	1m 32s
release aarch64-apple-darwin ptrcomp	2m 51s
release x86_64-apple-darwin	3m 4s
debug aarch64-apple-darwin ptrcomp	2m 55s
debug x86_64-unknown-linux-gnu	1m 20s
debug x86_64-unknown-linux-gnu ptrcomp	2m 28s
release x86_64-unknown-linux-gnu	2m 20s
release aarch64-apple-darwin	2m 51s
release aarch64-unknown-linux-gnu	1m 35s
release x86_64-apple-darwin ptrcomp	2m 58s
test aarch64-pc-windows-msvc	4m 41s
publish	0s
	1h 8m 5s

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