[NI] Infer type variable to Nothing if all upper constraints are from upper bounds

#KT-32196 Fixed

compiler/testData/diagnostics/tests/inference/kt32196.fir.kt

@@ -0,0 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class Inv<T>
+
+fun <R : Any> Inv<Int>.mapNotNull(transform: (Int) -> R?): Inv<R> = null!!
+
+fun test(inv: Inv<Int>) {
+    inv.mapNotNull { null }
+}

compiler/testData/diagnostics/tests/inference/kt32196.kt

@@ -0,0 +1,9 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+class Inv<T>
+
+fun <R : Any> Inv<Int>.mapNotNull(transform: (Int) -> R?): Inv<R> = null!!
+
+fun test(inv: Inv<Int>) {
+    <!DEBUG_INFO_EXPRESSION_TYPE("Inv<kotlin.Nothing>")!>inv.mapNotNull { null }<!>
+}

compiler/testData/diagnostics/tests/inference/kt32196.txt

@@ -0,0 +1,11 @@
+package
+
+public fun test(/*0*/ inv: Inv<kotlin.Int>): kotlin.Unit
+public fun </*0*/ R : kotlin.Any> Inv<kotlin.Int>.mapNotNull(/*0*/ transform: (kotlin.Int) -> R?): Inv<R>
+
+public final class Inv</*0*/ T> {
+    public constructor Inv</*0*/ T>()
+    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
+}