K2: Do not use KFunctionN as representation type for adapted references

Beside some corner cases, it's already prohibited in K1 because
adaptation have a bit strange nature
(they don't represent any existing real function exactly)

^KT-55137 Fixed

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

@@ -3111,6 +3111,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                     KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/diagnostics/tests/callableReference/adapted"), Pattern.compile("^(.+)\\.kt$"), Pattern.compile("^(.+)\\.fir\\.kts?$"), true);
                 }
 
+                @Test
+                @TestMetadata("noKFunctionForAdaptation.kt")
+                public void testNoKFunctionForAdaptation() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/callableReference/adapted/noKFunctionForAdaptation.kt");
+                }
+
                 @Test
                 @TestMetadata("simpleAdaptationOutsideOfCall.kt")
                 public void testSimpleAdaptationOutsideOfCall() throws Exception {