RISC-V: Remove the Scalar Bitmanip and Crypto Built-In function testsuites

The serials patch provides a mapping from the RV intrinsics to the builtin names.
There are some duplicates testsuites between intrinsic and built-in function.
Remove the Scalar Bitmanip and Scalar Crypto Built-In function testsuites
that will be included in the intrinsic functions.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/zbb_32_bswap-2.c: Moved to...
	* gcc.target/riscv/zbb_bswap16.c: ...here.
	* gcc.target/riscv/zbkb32.c: Remove __builtin_riscv_(un)zip and
	zip,__builtin_riscv_brev8.
	* gcc.target/riscv/zbkb64.c: Remove __builtin_riscv_brev8.
	* gcc.target/riscv/zbb_32_bswap-1.c: Removed.
	* gcc.target/riscv/zbb_bswap-1.c: Removed.
	* gcc.target/riscv/zbb_bswap-2.c: Removed.
	* gcc.target/riscv/zbbw.c: Removed.
	* gcc.target/riscv/zbc32.c: Removed.
	* gcc.target/riscv/zbc64.c: Removed.
	* gcc.target/riscv/zbkc32.c: Removed.
	* gcc.target/riscv/zbkc64.c: Removed.
	* gcc.target/riscv/zbkx32.c: Removed.
	* gcc.target/riscv/zbkx64.c: Removed.
	* gcc.target/riscv/zknd32-2.c: Removed.
	* gcc.target/riscv/zknd64-2.c: Removed.
	* gcc.target/riscv/zkne32-2.c: Removed.
	* gcc.target/riscv/zkne64-2.c: Removed.
	* gcc.target/riscv/zknh-sha256-32.c: Removed.
	* gcc.target/riscv/zknh-sha256-64.c: Removed.
	* gcc.target/riscv/zknh-sha512-32.c: Removed.
	* gcc.target/riscv/zknh-sha512-64.c: Removed.
	* gcc.target/riscv/zksed32-2.c: Removed.
	* gcc.target/riscv/zksed64-2.c: Removed.
	* gcc.target/riscv/zksh32.c: Removed.
	* gcc.target/riscv/zksh64.c: Removed.