[NI] Fix isNullableType for definitely not null type parameter

Consider type parameter with nullable bound not null
if it is inside of a definitely not null type.

compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.fir.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
+
+fun <D> makeDefinitelyNotNull(arg: D?): D = TODO()
+
+fun <N : Number?> test(arg: N) {
+    makeDefinitelyNotNull(arg) ?: 1
+
+    makeDefinitelyNotNull(arg)!!
+
+    makeDefinitelyNotNull(arg)?.toInt()
+
+    val nullImposible = when (val dnn = makeDefinitelyNotNull(arg)) {
+        null -> false
+        else -> true
+    }
+}

compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.kt

@@ -0,0 +1,17 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -UNUSED_EXPRESSION
+
+fun <D> makeDefinitelyNotNull(arg: D?): D = TODO()
+
+fun <N : Number?> test(arg: N) {
+    makeDefinitelyNotNull(arg) <!USELESS_ELVIS!>?: 1<!>
+
+    makeDefinitelyNotNull(arg)<!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
+
+    makeDefinitelyNotNull(arg)<!UNNECESSARY_SAFE_CALL!>?.<!>toInt()
+
+    val nullImposible = when (val dnn = makeDefinitelyNotNull(arg)) {
+        <!SENSELESS_NULL_IN_WHEN!>null<!> -> false
+        else -> true
+    }
+}

compiler/testData/diagnostics/tests/nullableTypes/definitelyNotNullWithNullableBound.txt

@@ -0,0 +1,4 @@
+package
+
+public fun </*0*/ D> makeDefinitelyNotNull(/*0*/ arg: D?): D
+public fun </*0*/ N : kotlin.Number?> test(/*0*/ arg: N): kotlin.Unit