tree-optimization/110897 - Fix missed vectorization of shift on both RISC-V and aarch64

Consider this following case:

#include <stdint.h>

#define TEST2_TYPE(TYPE)					\
  __attribute__((noipa))					\
  void vshiftr_##TYPE (TYPE *__restrict dst, TYPE *__restrict a, TYPE *__restrict b, int n)	\
  {								\
    for (int i = 0; i < n; i++)					\
      dst[i] = (a[i]) >> b[i];					\
  }

#define TEST_ALL()	\
 TEST2_TYPE(uint8_t)	\
 TEST2_TYPE(uint16_t)	\
 TEST2_TYPE(uint32_t)	\
 TEST2_TYPE(uint64_t)	\

TEST_ALL()

Both RISC-V and aarch64 of trunk GCC failed vectorize uint8_t/uint16_t with following missed report:

<source>:17:1: missed: couldn't vectorize loop
<source>:17:1: missed: not vectorized: relevant stmt not supported: patt_46 = MIN_EXPR <_6, 7>;
<source>:17:1: missed: couldn't vectorize loop
<source>:17:1: missed: not vectorized: relevant stmt not supported: patt_47 = MIN_EXPR <_7, 15>;
Compiler returned: 0

Both GCC 13.1 can vectorize, see:

https://godbolt.org/z/6vaMK5M1o

Bootstrap and regression on X86 passed.

Ok for trunk ?

gcc/ChangeLog:

	* tree-vect-patterns.cc (vect_recog_over_widening_pattern): Add op vectype.

gcc/testsuite/ChangeLog:

	* gcc.target/riscv/rvv/autovec/binop/narrow-1.c: Adapt testcase.