[fix](cluster key) improve cluster key lookup rowkey (#42470)

the min max key in mow with cluster key tables is also the min and max
of primay keys, so when lookup rowkey, can use it to filter some
segments.

be/src/olap/base_tablet.cpp

@@ -468,13 +468,9 @@ Status BaseTablet::lookup_row_key(const Slice& encoded_key, TabletSchema* latest
         DCHECK_EQ(segments_key_bounds.size(), num_segments);
         std::vector<uint32_t> picked_segments;
         for (int i = num_segments - 1; i >= 0; i--) {
-            // If mow table has cluster keys, the key bounds is short keys, not primary keys
-            // use PrimaryKeyIndexMetaPB in primary key index?
-            if (schema->cluster_key_idxes().empty()) {
-                if (key_without_seq.compare(segments_key_bounds[i].max_key()) > 0 ||
-                    key_without_seq.compare(segments_key_bounds[i].min_key()) < 0) {
-                    continue;
-                }
+            if (key_without_seq.compare(segments_key_bounds[i].max_key()) > 0 ||
+                key_without_seq.compare(segments_key_bounds[i].min_key()) < 0) {
+                continue;
             }
             picked_segments.emplace_back(i);
         }