[AA Standalone] Consider type aliases in direct inheritors search

A type alias may still be inherited from. For example:

```
sealed class MyClass

typealias T = MyClass

class Inheritor : T() // `Inheritor` is a direct inheritor of `MyClass`.
```

The index is a simplified version of the IDE's
`KotlinTypeAliasByExpansionShortNameIndex`, but it should be sufficient
for virtually all cases.

^KT-66013

analysis/analysis-api/testData/components/inheritorsProvider/sealedInheritors/sealedClassTypeAliasedFromDependency.txt

@@ -1,2 +1,8 @@
 /OneSealedChild
 class OneSealedChild : MySealedClass()
+
+/ThreeSealedChild
+class ThreeSealedChild : T2()
+
+/TwoSealedChild
+class TwoSealedChild : T1()

analysis/analysis-api/testData/components/inheritorsProvider/sealedInheritors/sealedClassTypeAliasedSameModule.txt

@@ -1,2 +1,8 @@
 /OneSealedChild
 class OneSealedChild : MySealedClass()
+
+/ThreeSealedChild
+class ThreeSealedChild : T2()
+
+/TwoSealedChild
+class TwoSealedChild : T1()

analysis/analysis-api/testData/components/inheritorsProvider/sealedInheritors/sealedInterfaceTypeAliasedFromDependency.txt

@@ -1,2 +1,8 @@
 /OneSealedChild
 class OneSealedChild : MySealedInterface
+
+/ThreeSealedChild
+class ThreeSealedChild : T2
+
+/TwoSealedChild
+class TwoSealedChild : T1

analysis/analysis-api/testData/components/inheritorsProvider/sealedInheritors/sealedInterfaceTypeAliasedSameModule.txt

@@ -1,2 +1,8 @@
 /OneSealedChild
 class OneSealedChild : MySealedInterface
+
+/ThreeSealedChild
+class ThreeSealedChild : T2
+
+/TwoSealedChild
+class TwoSealedChild : T1