Fix: constraint T? >: Int! should transform to T >: Int

compiler/testData/diagnostics/tests/controlStructures/typeInferenceForExclExcl.kt

@@ -0,0 +1,20 @@
+// !CHECK_TYPE
+// FILE: A.java
+public class A {
+    public static String foo() {
+        return "";
+    }
+}
+
+// FILE: b.kt
+fun <T: Any> exclExcl(t: T?): T = t!!
+
+fun test11() {
+    // not 'String!'
+    exclExcl(A.foo()) checkType { it : _<String> }
+    exclExcl(A.foo()) checkType { <!TYPE_MISMATCH!>it<!> : _<String?> }
+
+    // not 'String!'
+    A.foo()!! checkType { it : _<String> }
+    A.foo()!! checkType { <!TYPE_MISMATCH!>it<!> : _<String?> }
+}

compiler/testData/diagnostics/tests/controlStructures/typeInferenceForExclExcl.txt

@@ -0,0 +1,14 @@
+package
+
+internal fun </*0*/ T : kotlin.Any> exclExcl(/*0*/ t: T?): T
+internal fun test11(): kotlin.Unit
+
+public open class A {
+    public constructor A()
+    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
+
+    // Static members
+    public open fun foo(): kotlin.String!
+}