[mlir][vector] Remove Emulated Sub-directory

The "Emulated" sub-directory under "ArmSVE" has
been removed. Associated tests have been up a
directory and now include the "REQUIRES"
constraint for the arm-emulator.

mlir/test/Integration/Dialect/Vector/CPU/ArmSVE/lit.local.cfg

@@ -7,3 +7,8 @@ if not config.mlir_run_arm_sve_tests:
 # No JIT on win32.
 if sys.platform == "win32":
     config.unsupported = True
+
+# The tests in this folder assume full control of the hardware features, such as
+# the vector length, so must be run under an emulator.
+if not config.arm_emulator_executable:
+    config.unsupported = True

mlir/test/lit.cfg.py

@@ -250,3 +250,6 @@ def have_host_jit_feature_support(feature_name):
 
 if config.run_rocm_tests:
     config.available_features.add("host-supports-amdgpu")
+
+if config.arm_emulator_executable:
+    config.available_features.add("arm-emulator-executable")