fixup: src: introduce quant_entry_t and refactor arg_scales_t to rely on it

Case with different mask is not supported if only both scales were
specified.

Author: dzarukin

src/cpu/x64/jit_uni_reorder_utils.cpp

@@ -286,7 +286,11 @@ status_t prb_init(prb_t &p, const memory_desc_t &imd, const memory_desc_t &omd,
                 = dst_mask == 0 ? scale_type_t::COMMON : scale_type_t::MANY;
     }
 
-    if (src_mask != dst_mask) return status::unimplemented;
+    VDISPATCH_REORDER_IC(
+            IMPLICATION(p.src_scale_type != scale_type_t::NONE
+                            && p.dst_scale_type != scale_type_t::NONE,
+                    src_mask == dst_mask),
+            VERBOSE_UNSUPPORTED_SCALES_CFG);
 
     p.scale_adjust = (om_d.extra().flags & memory_extra_flags::scale_adjust)
             ? om_d.extra().scale_adjust