[LL] Add getOrBuildFir test for deserialized enum entry annotation argument

- The `getOrBuildFir` test clearly shows the difference between the
  unresolved enum entry and the resolved one (see the next commit).

^KT-63330

analysis/low-level-api-fir/testData/getOrBuildFir/deserialized/annotationWithEnumEntryArgument.txt

@@ -0,0 +1,12 @@
+KT element: KtProperty
+FIR element: FirPropertyImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+[ResolvedTo(BODY_RESOLVE)] lval x: R|@R|Anno|(enumEntry = )  Usage| = R|/usage|
+
+FIR FILE:
+FILE: [ResolvedTo(IMPORTS)] main.kt
+    public final [ResolvedTo(BODY_RESOLVE)] fun foo(): R|kotlin/Unit| {
+        [ResolvedTo(BODY_RESOLVE)] lval x: R|@R|Anno|(enumEntry = )  Usage| = R|/usage|
+    }