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

compiler/testData/diagnostics/tests/qualifiedExpression/variableVsImportedClassifier.kt

@@ -0,0 +1,31 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+// FILE: test/W.java
+package test;
+
+public class W {
+    public void foo() {}
+    public static void bar() {}
+}
+
+// FILE: main.kt
+package main1
+import test.W
+
+val W: W = W()
+
+fun main() {
+    W.foo()
+    W.<!UNRESOLVED_REFERENCE!>bar<!>()
+    W().foo()
+}
+
+// FILE: main2.kt
+package main2
+import test.W
+
+fun main() {
+    W.<!UNRESOLVED_REFERENCE!>foo<!>()
+    W.bar()
+    W().foo()
+}