[PATCH PR96357][GCC][AArch64]: could not split insn UNSPEC_COND_FSUB with AArch64 SVE

[PATCH PR96357][GCC][AArch64]: could not split insn UNSPEC_COND_FSUB with AArch64 SVE

Problem is related to that operand 4 (In original pattern
cond_sub<mode>_any_const) is no longer the same as operand 1, and so
the pattern doesn't match the split condition.

Pattern cond_sub<mode>_any_const is being split by this patch into two
separate patterns:
* Pattern cond_sub<mode>_relaxed_const now matches const_int
  SVE_RELAXED_GP operand.
* Pattern cond_sub<mode>_strict_const now matches const_int
  SVE_STRICT_GP operand.
* Remove aarch64_sve_pred_dominates_p condition from both patterns.

gcc/ChangeLog:

	PR target/96357
	* config/aarch64/aarch64-sve.md
	(cond_sub<mode>_relaxed_const): Updated and renamed from
	cond_sub<mode>_any_const pattern.
	(cond_sub<mode>_strict_const): New pattern.

gcc/testsuite/ChangeLog:

	PR target/96357
	* gcc.target/aarch64/sve/pr96357.c: New test.