fix(module:tree,tree-select): fix the styles of connecting line (#3385)

* fix(module:tree,tree-select): fix the styles of connecting line
* fix(module:tree): fix styles
* fix(module:tree-select): fix file name

close #3382

components/tree-select/style/entry.less

@@ -4,3 +4,4 @@
 @import '../../tree/style/entry.less';
 @import '../../select/style/index.less';
 @import '../../empty/style/index.less';
+@import "./patch.less";

components/tree-select/style/patch.less

@@ -0,0 +1,9 @@
+.ant-tree.ant-select-tree.ant-tree-show-line nz-tree-node:not(:last-child) > li::before {
+  content: ' ';
+  width: 1px;
+  border-left: 1px solid #d9d9d9;
+  height: calc(100% - 16px);
+  position: absolute;
+  left: 12px;
+  margin: 26px 0;
+}

components/tree/style/patch.less

@@ -6,34 +6,19 @@
  * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
  */
 
-.ant-tree {
-  &.ant-tree-show-line {
-    > nz-tree-node:not(:last-child), .ant-tree-child-tree > nz-tree-node:not(:last-child) {
-      > li:before {
-        content: ' ';
-        width: 1px;
-        border-left: 1px solid @border-color-base;
-        height: 100%;
-        position: absolute;
-        left: 12px;
-        margin: 22px 0;
-      }
-    }
-
-    .ant-tree-child-tree > nz-tree-node:last-child {
-      > li:before {
-        content: ' ';
-        width: 1px;
-        border-left: 0px solid @border-color-base;
-        height: 100%;
-        position: absolute;
-        left: 12px;
-        margin: 22px 0;
-      }
-    }
-  }
+.ant-tree.ant-tree-show-line nz-tree-node:not(:last-child) > li::before {
+  content: ' ';
+  width: 1px;
+  border-left: 1px solid @border-color-base;
+  height: 100%;
+  position: absolute;
+  left: 12px;
+  margin: 22px 0;
+}
 
-  .font-highlight {
-    color: @highlight-color;
-  }
+.font-highlight {
+  color: @highlight-color;
 }
+
+
+