[FIR] Use ConeKotlinType to represent vararg's element type

We are using `ConeKotlinType` instead of `FirTypeRef` to represent
that element type of vararg doesn't have any source. It has a type
that was inferred. If we try to specify a source, then we could
end up with the incorrect place for diagnostic.

#KT-59682 Fixed

compiler/testData/diagnostics/tests/inference/completion/postponedArgumentsAnalysis/notInferableParameterOfAnonymousFunction.fir.kt

@@ -1,13 +1,14 @@
 // !DIAGNOSTICS: -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
+// COMPARE_WITH_LIGHT_TREE
 
-fun <T> select(vararg x: <!CANNOT_INFER_PARAMETER_TYPE, CANNOT_INFER_PARAMETER_TYPE!>T<!>) = x[0]
+fun <T> select(vararg x: T) = x[0]
 fun <K> id(x: K) = x
 
 fun main() {
     val x1 = select<Any?>(id { x, y -> }, { x: Int, y -> })
-    val x2 = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(<!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>id<!> { x, <!CANNOT_INFER_PARAMETER_TYPE!>y<!> -> }, { x: Int, <!CANNOT_INFER_PARAMETER_TYPE!>y<!> -> })
+    val x2 = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(<!CANNOT_INFER_PARAMETER_TYPE{LT}!><!CANNOT_INFER_PARAMETER_TYPE{PSI}!><!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>id<!> { x, <!CANNOT_INFER_PARAMETER_TYPE!>y<!> -> }<!>, { x: Int, <!CANNOT_INFER_PARAMETER_TYPE!>y<!> -> }<!>)
 
-    val x3 = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(<!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>id<!>(fun (x, <!CANNOT_INFER_PARAMETER_TYPE!>y<!>) {}), fun (x: Int, <!CANNOT_INFER_PARAMETER_TYPE!>y<!>) {})
+    val x3 = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(<!CANNOT_INFER_PARAMETER_TYPE{LT}!><!CANNOT_INFER_PARAMETER_TYPE{PSI}!><!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>id<!>(fun (x, <!CANNOT_INFER_PARAMETER_TYPE!>y<!>) {})<!>, fun (x: Int, <!CANNOT_INFER_PARAMETER_TYPE!>y<!>) {}<!>)
 
     val x4 = select<Any?>((fun (x, y) {}), fun (x: Int, y) {})
     val x5 = select<Any?>(id(fun (<!CANNOT_INFER_PARAMETER_TYPE!>x<!>, <!CANNOT_INFER_PARAMETER_TYPE!>y<!>) {}), fun (x: Int, y) {})

compiler/testData/diagnostics/tests/inference/completion/postponedArgumentsAnalysis/notInferableParameterOfAnonymousFunction.kt

@@ -1,4 +1,5 @@
 // !DIAGNOSTICS: -UNUSED_ANONYMOUS_PARAMETER -UNUSED_VARIABLE
+// COMPARE_WITH_LIGHT_TREE
 
 fun <T> select(vararg x: T) = x[0]
 fun <K> id(x: K) = x

compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.fir.kt

@@ -1,10 +1,11 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 // !CHECK_TYPE
+// COMPARE_WITH_LIGHT_TREE
 
 class Inv<I>
 fun <T> materialize(): Inv<T> = TODO()
 fun <K> id(arg: K) = arg
-fun <S> select(vararg args: <!CANNOT_INFER_PARAMETER_TYPE, CANNOT_INFER_PARAMETER_TYPE!>S<!>): S = TODO()
+fun <S> select(vararg args: S): S = TODO()
 
 fun test1(b: Boolean?) {
     val v = when(b) {
@@ -17,7 +18,7 @@ fun test1(b: Boolean?) {
 
 fun test2() {
     <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(
-        <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>materialize<!>()
+        <!CANNOT_INFER_PARAMETER_TYPE!><!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>materialize<!>()<!>
     )
     select(materialize(), materialize<String>())
     select(materialize(), null, Inv<String>())
@@ -26,8 +27,8 @@ fun test2() {
         null
     )<!>
     <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>select<!>(
-        <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>materialize<!>(),
-        materialize()
+        <!CANNOT_INFER_PARAMETER_TYPE{LT}!><!CANNOT_INFER_PARAMETER_TYPE{PSI}!><!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>materialize<!>()<!>,
+        materialize()<!>
     )
     select(
         <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>materialize<!>(),

compiler/testData/diagnostics/tests/inference/nothingType/notEnoughInformationAndNothing.kt

@@ -1,5 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_VARIABLE -UNUSED_PARAMETER
 // !CHECK_TYPE
+// COMPARE_WITH_LIGHT_TREE
 
 class Inv<I>
 fun <T> materialize(): Inv<T> = TODO()

compiler/testData/diagnostics/tests/inference/regressions/kt2200.fir.kt

@@ -5,7 +5,7 @@ package n
 import checkSubtype
 
 fun main() {
-    val a = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>array<!>(array())
+    val a = <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!>array<!>(<!CANNOT_INFER_PARAMETER_TYPE!>array()<!>)
     val a0 : Array<Array<Int>> = array(array())
     val a1 = array(array<Int>())
     checkSubtype<Array<Array<Int>>>(a1)
@@ -15,4 +15,4 @@ fun main() {
 
 //from library
 @Suppress("UNCHECKED_CAST")
-fun <T> array(vararg t : <!CANNOT_INFER_PARAMETER_TYPE!>T<!>) : Array<T> = t as Array<T>
+fun <T> array(vararg t : T) : Array<T> = t as Array<T>