[FE 1.0] Don't fail with exception on unresolved type with type argument

^KT-50223 Fixed

compiler/testData/diagnostics/tests/incompleteCode/unresolvedTypeWithTypeArguments.fir.kt

@@ -0,0 +1,7 @@
+abstract class MyClass {
+    abstract fun <P1> foo(): (P1) -> <!UNRESOLVED_REFERENCE!>Unknown<String><!>
+
+    private fun callTryConvertConstant() {
+        <!UNRESOLVED_REFERENCE!>println<!>(foo<String>())
+    }
+}

compiler/testData/diagnostics/tests/incompleteCode/unresolvedTypeWithTypeArguments.kt

@@ -0,0 +1,7 @@
+abstract class MyClass {
+    abstract fun <P1> foo(): (P1) -> <!UNRESOLVED_REFERENCE!>Unknown<!><String>
+
+    private fun callTryConvertConstant() {
+        <!UNRESOLVED_REFERENCE!>println<!>(foo<String>())
+    }
+}

compiler/testData/diagnostics/tests/incompleteCode/unresolvedTypeWithTypeArguments.txt

@@ -0,0 +1,10 @@
+package
+
+public abstract class MyClass {
+    public constructor MyClass()
+    private final fun callTryConvertConstant(): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun </*0*/ P1> foo(): (P1) -> [Error type: Unresolved type for Unknown<String>]<kotlin.String>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}