KT-5292 Expand selection should have kdoc + method as a stop point

KT-3947 Extend selection works badly with comment

 #KT-5292 Fixed
 #KT-3947 Fixed

idea/testData/wordSelection/DocComment/0.kt

@@ -0,0 +1,9 @@
+package p
+
+/**
+ * Doc comment <caret>here
+ */
+fun foo() {
+}
+
+fun bar(){}

idea/testData/wordSelection/DocComment/1.kt

@@ -0,0 +1,9 @@
+package p
+
+/**
+ * Doc comment <selection><caret>here</selection>
+ */
+fun foo() {
+}
+
+fun bar(){}

idea/testData/wordSelection/DocComment/2.kt

@@ -0,0 +1,9 @@
+package p
+
+/**
+ *<selection> Doc comment <caret>here</selection>
+ */
+fun foo() {
+}
+
+fun bar(){}

idea/testData/wordSelection/DocComment/3.kt

@@ -0,0 +1,9 @@
+package p
+
+<selection>/**
+ * Doc comment <caret>here
+ */
+</selection>fun foo() {
+}
+
+fun bar(){}

idea/testData/wordSelection/DocComment/4.kt

@@ -0,0 +1,9 @@
+package p
+
+<selection>/**
+ * Doc comment <caret>here
+ */
+fun foo() {
+}
+</selection>
+fun bar(){}