aarch64: Update feature macro name
GCC used the name __ARM_FEATURE_SVE_VECTOR_OPERATIONS, but in the
final spec it was renamed to__ARM_FEATURE_SVE_VECTOR_OPERATORS.
gcc/
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Rename
__ARM_FEATURE_SVE_VECTOR_OPERATIONS to
__ARM_FEATURE_SVE_VECTOR_OPERATORS.
gcc/testsuite/
* gcc.target/aarch64/sve/acle/general/attributes_1.c: Rename
__ARM_FEATURE_SVE_VECTOR_OPERATIONS to
__ARM_FEATURE_SVE_VECTOR_OPERATORS.
(cherry picked from commit
ef4af9eddea5a658eb7d6dc29fcb58aa54c9dd9f)