FIR. Refactor smart-cast representation in FIR tree

Make smart-casts non-transparent expression without delegation
to underlying FirQualifiedAccessExpression, as children delegation in
fir tree has unclear semantics
Remove two different kinds of tree nodes for smart-casts

analysis/analysis-api-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/components/callResolver/FirStandaloneNormalAnalysisSourceModuleResolveCallTestGenerated.java

@@ -832,6 +832,12 @@ public class FirStandaloneNormalAnalysisSourceModuleResolveCallTestGenerated ext
         runTest("analysis/analysis-api/testData/components/callResolver/resolveCall/variableWithMemberInvoke.kt");
     }
 
+    @Test
+    @TestMetadata("whenSelectorSmartCast.kt")
+    public void testWhenSelectorSmartCast() throws Exception {
+        runTest("analysis/analysis-api/testData/components/callResolver/resolveCall/whenSelectorSmartCast.kt");
+    }
+
     @Nested
     @TestMetadata("analysis/analysis-api/testData/components/callResolver/resolveCall/assignments")
     @TestDataPath("$PROJECT_ROOT")

analysis/analysis-api-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/components/smartCastProvider/FirStandaloneNormalAnalysisSourceModuleHLSmartCastInfoTestGenerated.java

@@ -46,6 +46,12 @@ public class FirStandaloneNormalAnalysisSourceModuleHLSmartCastInfoTestGenerated
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("analysis/analysis-api/testData/components/smartCastProvider/smartCastInfo"), Pattern.compile("^(.+)\\.kt$"), null, true);
     }
 
+    @Test
+    @TestMetadata("bothImplicitReceiversSmartCast.kt")
+    public void testBothImplicitReceiversSmartCast() throws Exception {
+        runTest("analysis/analysis-api/testData/components/smartCastProvider/smartCastInfo/bothImplicitReceiversSmartCast.kt");
+    }
+
     @Test
     @TestMetadata("multiSmartcastAsReceiver_stable.kt")
     public void testMultiSmartcastAsReceiver_stable() throws Exception {

analysis/analysis-api-standalone/tests-gen/org/jetbrains/kotlin/analysis/api/standalone/fir/test/cases/generated/cases/references/FirStandaloneNormalAnalysisSourceModuleReferenceResolveTestGenerated.java

@@ -460,6 +460,18 @@ public class FirStandaloneNormalAnalysisSourceModuleReferenceResolveTestGenerate
         runTest("analysis/analysis-api/testData/referenceResolve/SeveralOverrides.kt");
     }
 
+    @Test
+    @TestMetadata("smartCastExpression.kt")
+    public void testSmartCastExpression() throws Exception {
+        runTest("analysis/analysis-api/testData/referenceResolve/smartCastExpression.kt");
+    }
+
+    @Test
+    @TestMetadata("smartCastInvokeReceiver.kt")
+    public void testSmartCastInvokeReceiver() throws Exception {
+        runTest("analysis/analysis-api/testData/referenceResolve/smartCastInvokeReceiver.kt");
+    }
+
     @Test
     @TestMetadata("SuperTypePrimaryConstructor.kt")
     public void testSuperTypePrimaryConstructor() throws Exception {