Support for import aliases in both resolve and completion in KDoc

idea/idea-completion/testData/basic/java/importAliases/KDoc.kt

@@ -0,0 +1,8 @@
+import java.sql.Date as SqlDate
+
+/**
+ * [Sql<caret>]
+ */
+fun foo(){}
+
+// EXIST: { lookupString: "SqlDate", itemText: "SqlDate", tailText: " (java.sql.Date)" }