[LL FIR] LLFirStatusTargetResolver: add missing branch for FirFile

It is better to explicitly say that we shouldn't do anything in the
case of the file. It worked before because of `needResolveMembers == false`
and `needResolveNestedClassifiers == false` inside
`LLFirStatusTargetResolver.Transformer`

^KT-65344

analysis/low-level-api-fir/src/org/jetbrains/kotlin/analysis/low/level/api/fir/transformers/LLFirStatusLazyResolver.kt

@@ -188,7 +188,7 @@ private class LLFirStatusTargetResolver(
     override fun doLazyResolveUnderLock(target: FirElementWithResolveState) {
         when (target) {
             is FirRegularClass -> error("should be resolved in doResolveWithoutLock")
-            is FirScript -> {}
+            is FirFile, is FirScript -> {}
             else -> target.transformSingle(transformer, data = null)
         }
     }