Name suggester: Improve name suggestion strategy for type parameters

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterClassMember.kt

@@ -1,7 +1,7 @@
 // "Create function 'foo'" "true"
 
 class B<T>(val t: T) {
-    fun <T1, T2> foo(arg: T1, arg1: T2): T1 {
+    fun <U, V> foo(arg: U, arg1: V): U {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterClassMemberPartialSubstitution.kt

@@ -1,7 +1,7 @@
 // "Create function 'foo'" "true"
 
 class B<T>(val t: T) {
-    fun <T1> foo(i: Int, arg: T1): Int {
+    fun <U> foo(i: Int, arg: U): Int {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterClassMemberWithReceiverArg.kt

@@ -1,7 +1,7 @@
 // "Create function 'foo'" "true"
 
 class B<T>(val t: T) {
-    fun <T1, T2> foo(arg: T1, arg1: T2): T1 {
+    fun <U, V> foo(arg: U, arg1: V): U {
         throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
 

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterExtension.kt

@@ -6,6 +6,6 @@ class A<T>(val items: List<T>) {
     }
 }
 
-fun <E, T, T1> List<E>.foo(arg: T, arg1: T1): T {
+fun <E, T, U> List<E>.foo(arg: T, arg1: U): T {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterExtensionWithReceiverArg.kt

@@ -6,6 +6,6 @@ class A<T>(val items: List<T>) {
     }
 }
 
-fun <E, T, T1> List<E>.foo(arg: T, arg1: T1): T {
+fun <E, T, U> List<E>.foo(arg: T, arg1: U): T {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterNoReceiver.kt

@@ -4,6 +4,6 @@ fun test(): Int {
     return foo<String, Int>(2, "2")
 }
 
-fun <T, T1> foo(arg: T1, arg1: T): T1 {
+fun <T, U> foo(arg: U, arg1: T): U {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterNoReceiverExtraArgs.kt

@@ -4,6 +4,6 @@ fun test(): Int {
     return foo<String, Int, Boolean>(2, "2")
 }
 
-fun <T, T1, T2> foo(arg: T1, arg1: T): T1 {
+fun <T, U, V> foo(arg: U, arg1: T): U {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }

idea/testData/quickfix/createFromUsage/createFunction/call/typeArguments/afterNoReceiverLongName.kt

@@ -4,6 +4,6 @@ fun test(): Int {
     return foo<String, Int>(2, "2")
 }
 
-fun <T, T1> foo(arg: T1, arg1: T): T1 {
+fun <T, U> foo(arg: U, arg1: T): U {
     throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
 }