[NFC] Change the name of the default device provided by the new registration framework (#2186)

The code base uses a mix of 'device' and 'deviceID'. I suggest we
standardise on 'device' which is shorter and slightly more prevalent.

Contributes to #2181

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

test_conformance/spirv_new/test_op_branch_conditional.cpp

@@ -100,7 +100,7 @@ int test_branch_conditional(cl_device_id deviceID,
             out[i] = lhs[i] < rhs[i] ? (rhs[i] - lhs[i]) : (lhs[i] - rhs[i]);  \
         }                                                                      \
                                                                                \
-        return test_branch_conditional(deviceID, context, queue, #name, lhs,   \
+        return test_branch_conditional(device, context, queue, #name, lhs,     \
                                        rhs, out);                              \
     }