RISC-V: Update RVV intrinsic version to ratified v1.0

RISC-V: Update RVV intrinsic version to ratified v1.0

The RVV intrinsic implementation already matches the ratified v1.0
interface, but GCC still advertises __riscv_v_intrinsic as v0.12 and
the manual still points users at the stale v0.11.x documentation.

Update __riscv_v_intrinsic to v1.0, adjust the related tests, and
update the manual to say that GCC supports the ratified v1.0 RVV
intrinsic specification and point at the v1.0-ratified release.

gcc/ChangeLog:

	* config/riscv/riscv-c.cc (riscv_cpu_cpp_builtins): Set
	__riscv_v_intrinsic to v1.0.
	* doc/extend.texi (RISC-V Vector Intrinsics): Document the
	ratified v1.0 RVV intrinsic specification and update the link.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/predef-__riscv_v_intrinsic.c: Update expected
	__riscv_v_intrinsic value.
	* gcc.target/riscv/rvv/base/pr114017-1.c: Update version check and
	expected warning text to v1.0.

Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>