[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/smartCasts/insideLoop.copy.txt

@@ -0,0 +1,43 @@
+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
+        Scope: FirLocalScope
+            Properties:
+                FirValueParameterSymbol initial: R|Node|
+    Element 7
+        Scope: FirLocalScope
+            Properties:
+                FirPropertySymbol lvar current: R|Node|
+    Element 8
+        Scope: FirLocalScope
+Smart Casts:
+    FirPropertySymbol lvar current: R|Node|
+    Types:
+        kotlin.Any
+
+FILE: [ResolvedTo(IMPORTS)] insideLoop.kt
+    public final? [ResolvedTo(RAW_FIR)] interface Node : R|kotlin/Any| {
+        public? final? [ResolvedTo(RAW_FIR)] val parent: Node?
+            public? [ResolvedTo(RAW_FIR)] get(): Node?
+
+    }
+    public final [ResolvedTo(BODY_RESOLVE)] fun test([ResolvedTo(BODY_RESOLVE)] initial: R|Node|): R|kotlin/Unit| {
+        [ResolvedTo(BODY_RESOLVE)] lvar current: R|Node| = R|<local>/initial|
+        while(!=(R|<local>/current|, Null(null))) {
+            R|/consume|(R|<local>/current|)
+            R|<local>/current| = R|<local>/current|.R|/Node.parent|
+        }
+
+    }
+    public? final? [ResolvedTo(RAW_FIR)] fun consume([ResolvedTo(RAW_FIR)] node: Node): R|kotlin/Unit| { LAZY_BLOCK }