Add wasm32-wasip2 target support #1151

Job	Run time
Clippy	7s
Rustfmt	20s
Test (stable)	12s
Test (1.63.0)	1m 27s
Check (aarch64-apple-darwin)	30s
Test (beta)	19s
Check (aarch64-apple-ios)	31s
Test (nightly)	18s
Check (aarch64-apple-tvos)	29s
Test (macos)	21s
Check (aarch64-apple-watchos)	31s
Test (windows)	1m 52s
Check (aarch64-linux-android)	30s
Check (aarch64-unknown-freebsd)	30s
Check (aarch64-unknown-linux-gnu)	31s
Check (aarch64-unknown-linux-musl)	30s
Check (aarch64-unknown-netbsd)	29s
Check (aarch64-unknown-openbsd)	32s
Check (aarch64-unknown-redox)	28s
Check (arm-linux-androideabi)	29s
Check (arm64_32-apple-watchos)	34s
Check (armv7-linux-androideabi)	30s
Check (armv7-sony-vita-newlibeabihf)	27s
Check (i686-linux-android)	29s
Check (i686-unknown-linux-gnu)	30s
Check (sparcv9-sun-solaris)	29s
Check (wasm32-wasip2)	25s
Check (x86_64-apple-darwin)	28s
Check (x86_64-apple-ios)	33s
Check (x86_64-pc-solaris)	28s
Check (x86_64-pc-windows-msvc)	29s
Check (x86_64-unknown-dragonfly)	32s
Check (x86_64-unknown-freebsd)	29s
Check (x86_64-unknown-fuchsia)	31s
Check (x86_64-unknown-illumos)	28s
Check (x86_64-unknown-linux-gnu)	31s
Check (x86_64-unknown-linux-musl)	29s
Check (x86_64-unknown-netbsd)	32s
Check (x86_64-unknown-openbsd)	28s
Check (x86_64-unknown-redox)	30s
	20m 48s

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