vect: Fix regression for PR104116

vect: Fix regression for PR104116

The commit gcc-16-4464-g6883d51304f added 30 new tests for testing
vectorization of {FLOOR,MOD,ROUND}_{DIV,MOD}_EXPR. Few of them failed
for certain targets due to the vectorization of runtime-check loop which
was not intended.
This patch disables optimization for all of the run-time check loops so
that the count of vectorized loop is always 1.

2025-10-21  Avinash Jayakar  <avinashd@linux.ibm.com>

gcc/testsuite/ChangeLog:
	PR target/104116
	* gcc.dg/vect/pr104116-ceil-div-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-div-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-div.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-mod-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-mod-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-mod.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-udiv-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-udiv-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-udiv.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-umod-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-umod-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-ceil-umod.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-div-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-div-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-div.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-mod-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-mod-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-floor-mod.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-div-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-div-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-div.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-mod-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-mod-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-mod.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-udiv-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-udiv-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-udiv.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-umod-2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-umod-pow2.c: disable vectorization.
	* gcc.dg/vect/pr104116-round-umod.c: disable vectorization.
	* gcc.dg/vect/pr104116.h (init_arr): use std idiom, correct
	indentation.
	(init_uarr): use std idiom.