Support DNN types in approximator

Mostly, it's relevant to FIR since there we started loading
type parameter based types as (T & Any..T?)

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java

@@ -18464,6 +18464,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 runTest("compiler/testData/diagnostics/tests/j+k/recursiveRawUpperBound3.kt");
             }
 
+            @Test
+            @TestMetadata("recursiveSelfTypes.kt")
+            public void testRecursiveSelfTypes() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/j+k/recursiveSelfTypes.kt");
+            }
+
             @Test
             @TestMetadata("safeCallDefinitelyNotNull.kt")
             public void testSafeCallDefinitelyNotNull() throws Exception {