Add the VFPU prefix tests to tests_next

prefix_branch passes on every core. prefix_ctrl fails on the IR path
(out-of-size swizzle lanes) and the arm64 JIT (that, plus mtvc not
masking). prefix_consume fails everywhere: the interpreter and IR in lane
w of nine ops where the T prefix holds a constant 0, the arm64 JIT on
nineteen ops.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

test.py

@@ -93,6 +93,7 @@ tests_good = [
   "cpu/vfpu/convert",
   "cpu/vfpu/convert_scaled",
   "cpu/vfpu/minmax",
+  "cpu/vfpu/prefix_branch",
   "cpu/vfpu/gum",
   "cpu/vfpu/matrix",
   "cpu/vfpu/vavg",
@@ -469,6 +470,8 @@ known_failures = {
 tests_next = [
 # These are the next tests up for fixing. These run by default.
   "cpu/fpu/fcr",
+  "cpu/vfpu/prefix_consume",  # see the pspautotests commit for what differs per core
+  "cpu/vfpu/prefix_ctrl",
   "cpu/vfpu/minmax_tie",  # vmin/vmax return the second operand on a -0/+0 tie; the IR path returns the first
   "cpu/vfpu/minmax_zero",  # signed zero and denormals in vmin/vmax
   "cpu/vfpu/prefixes",