[Analysis API] Test 'IGNORE_SELF' mode in context collector tests

Parent declarations of the file copy are typically unresolved in the
'IGNORE_SELF' mode, as the declaration designation contains declarations
from the original file.

analysis/low-level-api-fir/testData/contextCollector/propertyAccessor.copy.txt

@@ -0,0 +1,34 @@
+Tower Data Context:
+    Element 0
+        Scope: FirDefaultStarImportingScope
+    Element 1
+        Scope: FirExplicitStarImportingScope
+    Element 2
+        Scope: FirDefaultSimpleImportingScope
+    Element 3
+        Scope: FirDefaultSimpleImportingScope
+    Element 4
+        Scope: FirPackageMemberScope
+    Element 5
+        Scope: FirExplicitSimpleImportingScope
+    Element 6
+        Implicit receiver:
+            FirRegularClassSymbol public final class Foo : R|kotlin/Any|
+                Type: Foo
+    Element 7
+        Scope: FirLocalScope
+            Properties:
+                FirBackingFieldSymbol private <explicit backing field>: R|kotlin/Int|
+
+FILE: [ResolvedTo(IMPORTS)] propertyAccessor.kt
+    public final? [ResolvedTo(RAW_FIR)] class Foo : R|kotlin/Any| {
+        public? [ResolvedTo(RAW_FIR)] constructor(): R|Foo| {
+            LAZY_super<R|kotlin/Any|>
+        }
+
+        public final [ResolvedTo(BODY_RESOLVE)] val x: R|kotlin/Int|
+            public [ResolvedTo(BODY_RESOLVE)] get(): R|kotlin/Int| {
+                ^ Int(42)
+            }
+
+    }