testsuite: Add pragma novector to more tests [PR118464]

These loops will now vectorize the entry finding
loops.  As such we get more failures because they
were not expecting to be vectorized.

Fixed by adding #pragma GCC novector.

gcc/testsuite/ChangeLog:

	PR tree-optimization/118464
	PR tree-optimization/116855
	* g++.dg/ext/pragma-unroll-lambda-lto.C: Add pragma novector.
	* gcc.dg/tree-ssa/gen-vect-2.c: Likewise.
	* gcc.dg/tree-ssa/gen-vect-25.c: Likewise.
	* gcc.dg/tree-ssa/gen-vect-32.c: Likewise.
	* gcc.dg/tree-ssa/ivopt_mult_2g.c: Likewise.
	* gcc.dg/tree-ssa/ivopts-5.c: Likewise.
	* gcc.dg/tree-ssa/ivopts-6.c: Likewise.
	* gcc.dg/tree-ssa/ivopts-7.c: Likewise.
	* gcc.dg/tree-ssa/ivopts-8.c: Likewise.
	* gcc.dg/tree-ssa/ivopts-9.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-1.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-10.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-11.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-12.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-2.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-3.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-4.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-5.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-6.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-7.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-8.c: Likewise.
	* gcc.dg/tree-ssa/predcom-dse-9.c: Likewise.
	* gcc.target/i386/pr90178.c: Likewise.