Add IntoRawHandle impl for FFI ownership transfer #412

Job	Run time
cargo-deny (advisories)	19s
lint	24s
cargo-deny (bans licenses sources)	21s
aarch64-apple-darwin / build	21s
aarch64-apple-ios / build	28s
aarch64-apple-darwin-nightly / build	57s
aarch64-unknown-linux-gnu / build	28s
arm-linux-androideabi / build	22s
aarch64-unknown-linux-musl / build	58s
armv7-linux-androideabi / build	21s
i686-pc-windows-gnu / build	1m 9s
i686-pc-windows-msvc / build	1m 25s
i686-unknown-linux-gnu / build	43s
i686-unknown-linux-musl / build	1m 32s
msrv-aarch64-apple-darwin / build	50s
msrv-arm-linux-androideabi / build	45s
msrv-x86_64-pc-windows-msvc / build	53s
msrv-x86_64-unknown-freebsd / build	52s
msrv-x86_64-unknown-linux-gnu / build	56s
msrv-x86_64-unknown-netbsd / build	50s
msrv-x86_64-unknown-linux-musl / build	1m 3s
x86_64-apple-darwin / build	33s
x86_64-pc-windows-gnu / build	2m 17s
x86_64-pc-windows-msvc / build	1m 30s
x86_64-pc-windows-msvc-nightly / build	1m 56s
x86_64-unknown-freebsd / build	25s
x86_64-unknown-linux-gnu / build	53s
x86_64-unknown-linux-gnu-nightly / build	52s
x86_64-unknown-linux-musl / build	1m 8s
x86_64-unknown-netbsd / build	39s
	26m 10s

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