Middle-end: Do not model address cost for SELECT_VL style vectorization

Middle-end: Do not model address cost for SELECT_VL style vectorization

Follow Richard's suggestions, we should not model address cost in the loop
vectorizer for select_vl or decrement IV since other style vectorization doesn't
do that.

To make cost model comparison apple to apple.
This patch set COST from 2 to 1 which turns out have better codegen
in various codegen for RVV.

Ok for trunk ?

	PR target/111153

gcc/ChangeLog:

	* tree-vect-loop.cc (vect_estimate_min_profitable_iters):
	Remove address cost for select_vl/decrement IV.

gcc/testsuite/ChangeLog:

	* gcc.dg/vect/costmodel/riscv/rvv/pr111153.c: Moved to...
	* gcc.dg/vect/costmodel/riscv/rvv/pr11153-2.c: ...here.
	* gcc.dg/vect/costmodel/riscv/rvv/pr111153-1.c: New test.