FIR: Rework qualifier-in-expression resolution

Get rid of stateful FirQualifiedNameResolver
Resolve a.b.c-like calls step-by-step using just recursion

^KT-48363 Fixed

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/qualifiedExpressions/firstPartOfQualifiedCallWithNestedClasses.txt

@@ -1,5 +1,5 @@
 KT element: KtNameReferenceExpression
-FIR element: FirFunctionCallImpl
+FIR element: FirResolvedQualifierImpl
 
 FIR element rendered:
-Q|A.B|.R|/A.B.C.C|()
+Q|A.B|

idea/idea-frontend-fir/idea-fir-low-level-api/testdata/getOrBuildFir/qualifiedExpressions/qualifiedPartOfQualifiedCallWithNestedClasses.txt

@@ -1,5 +1,5 @@
 KT element: KtDotQualifiedExpression
-FIR element: FirFunctionCallImpl
+FIR element: FirResolvedQualifierImpl
 
 FIR element rendered:
-Q|A.B|.R|/A.B.C.C|()
+Q|A.B|

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

@@ -22641,6 +22641,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                 runTest("compiler/testData/diagnostics/tests/qualifiedExpression/TypeWithError.kt");
             }
 
+            @Test
+            @TestMetadata("variableVsImportedClassifier.kt")
+            public void testVariableVsImportedClassifier() throws Exception {
+                runTest("compiler/testData/diagnostics/tests/qualifiedExpression/variableVsImportedClassifier.kt");
+            }
+
             @Test
             @TestMetadata("visibleClassVsQualifiedClass.kt")
             public void testVisibleClassVsQualifiedClass() throws Exception {

idea/idea-frontend-fir/testData/referenceResolve/ClassObjectClassLiteralReferenceWithField.txt

@@ -1,2 +1,2 @@
 Resolved to:
-0: (in t.A.Named) val i: kotlin.Int
+0: (in t) class A