KT-11588 Type aliases

Create substituted constructor descriptors for generic type aliases.

compiler/testData/diagnostics/tests/typealias/typeAliasArgumentsInConstructor.kt

@@ -0,0 +1,5 @@
+class Pair<T1, T2>(val x1: T1, val x2: T2)
+
+typealias P2<T> = Pair<T, T>
+
+val test1 = P2<String>("", "")

compiler/testData/diagnostics/tests/typealias/typeAliasArgumentsInConstructor.txt

@@ -0,0 +1,13 @@
+package
+
+public typealias P2</*0*/ T>  = Pair<T, T>
+public val test1: Pair<kotlin.String, kotlin.String>
+
+public final class Pair</*0*/ T1, /*1*/ T2> {
+    public constructor Pair</*0*/ T1, /*1*/ T2>(/*0*/ x1: T1, /*1*/ x2: T2)
+    public final val x1: T1
+    public final val x2: T2
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}