RISC-V: Use default cost model for insn scheduling

Use default cost model scheduling on these test cases. All these tests
introduce scan dump failures with -mtune generic-ooo. Since the vector
cost models are the same across all three tunes, some of the tests
in PR113249 will be fixed with this patch series.

	PR target/113249

gcc/testsuite/ChangeLog:

	* g++.target/riscv/rvv/base/bug-1.C: Use default scheduling
	* gcc.target/riscv/rvv/autovec/reduc/reduc_call-2.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-102.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-108.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-114.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-119.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-12.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-16.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-17.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-19.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-21.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-23.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-25.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-27.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-29.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-31.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-33.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-35.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-4.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-40.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-44.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-50.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-56.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-62.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-68.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-74.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-79.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-8.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-84.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-90.c: Ditto
	* gcc.target/riscv/rvv/base/binop_vx_constraint-96.c: Ditto
	* gcc.target/riscv/rvv/base/float-point-dynamic-frm-30.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-1.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-2.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-3.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-4.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-5.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-6.c: Ditto
	* gcc.target/riscv/rvv/base/pr108185-7.c: Ditto
	* gcc.target/riscv/rvv/base/shift_vx_constraint-1.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/pr111037-3.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_back_prop-28.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_back_prop-29.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_back_prop-32.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_back_prop-33.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_single_block-17.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_single_block-18.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_single_block-19.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-10.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-11.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-12.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-4.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-5.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-6.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-7.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-8.c: Ditto
	* gcc.target/riscv/rvv/vsetvl/vlmax_switch_vtype-9.c: Ditto
	* gfortran.dg/vect/vect-8.f90: Ditto

Signed-off-by: Edwin Lu <ewlu@rivosinc.com>