KT-16250 Handle type alias as imported name qualifier

#KT-16250 Fixed

compiler/frontend/src/org/jetbrains/kotlin/resolve/QualifiedExpressionResolver.kt

@@ -214,11 +214,13 @@ class QualifiedExpressionResolver {
             return null
         }
 
-        val packageOrClassDescriptor = resolveToPackageOrClass(
+        val resolvedDescriptor = resolveToPackageOrClass(
                 path.subList(0, path.size - 1), moduleDescriptor, trace,
                 packageFragmentForVisibilityCheck, scopeForFirstPart = null, position = QualifierPosition.IMPORT
         ) ?: return null
 
+        val packageOrClassDescriptor = (resolvedDescriptor as? TypeAliasDescriptor)?.let { it.classDescriptor ?: return null } ?: resolvedDescriptor
+
         return LazyExplicitImportScope(packageOrClassDescriptor, packageFragmentForVisibilityCheck, lastPart.name, aliasName) {
             candidates ->
 

compiler/testData/diagnostics/tests/typealias/importFromTypeAliasObject.kt

@@ -0,0 +1,15 @@
+// FILE: 1.kt
+package bar
+
+typealias HostAlias = Host
+
+object Host {
+    fun foo() {}
+}
+
+// FILE: 2.kt
+import bar.HostAlias.foo
+
+fun test() {
+    foo()
+}

compiler/testData/diagnostics/tests/typealias/importFromTypeAliasObject.txt

@@ -0,0 +1,15 @@
+package
+
+public fun test(): kotlin.Unit
+
+package bar {
+
+    public object Host {
+        private constructor Host()
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public final fun foo(): kotlin.Unit
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+    public typealias HostAlias = bar.Host
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -21913,6 +21913,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 doTest(fileName);
             }
 
+            @TestMetadata("importFromTypeAliasObject.kt")
+            public void testImportFromTypeAliasObject() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/typealias/importFromTypeAliasObject.kt");
+                doTest(fileName);
+            }
+
             @TestMetadata("inGenerics.kt")
             public void testInGenerics() throws Exception {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/typealias/inGenerics.kt");