[FIR] Support typealiases in FirTypeAnnotationChecker

`directExpansionType` is needed here for cases like
`typealias S = @S Suppress`. Otherwise, `fullyExpandedType`
would cache the same typealias

compiler/testData/diagnostics/tests/FreeFunctionCalledAsExtension.fir.kt

@@ -5,8 +5,9 @@ fun foo(a: (String) -> Unit) {
 
 
 interface A : (String) -> Unit {}
+typealias AliasedEFT = ExtensionFunctionType
 
-fun foo(a: <!WRONG_EXTENSION_FUNCTION_TYPE_WARNING!>@ExtensionFunctionType<!> A) {
+fun foo(a: <!WRONG_EXTENSION_FUNCTION_TYPE_WARNING!>@AliasedEFT<!> A) {
     // @Extension annotation on an unrelated type shouldn't have any effect on this diagnostic.
     // Only kotlin.Function{n} type annotated with @Extension should
     "".a()