Don't report warning about implicitly inferred Nothing for call arguments if there is non-Nothing return type

^KT-43108 Fixed

compiler/testData/diagnostics/testsWithStdLib/inference/nothingType/dontSpreadWarningToNotReturningNothingSubResolvedAtoms.kt

@@ -0,0 +1,6 @@
+// FIR_IDENTICAL
+fun get(map: Map<String, Int>, key: String?): Int? {
+    return map[key]?.let { x ->
+        return x
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/inference/nothingType/dontSpreadWarningToNotReturningNothingSubResolvedAtoms.txt

@@ -0,0 +1,3 @@
+package
+
+public fun get(/*0*/ map: kotlin.collections.Map<kotlin.String, kotlin.Int>, /*1*/ key: kotlin.String?): kotlin.Int?