[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/contextReceivers.copy.txt

@@ -0,0 +1,41 @@
+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
+    Element 7
+        Context receivers:
+            FirNamedFunctionSymbol context(R|Foo|, R|Bar|)
+            public final fun test(): R|kotlin/Unit|
+                Type: Foo
+                Label: Foo
+            FirNamedFunctionSymbol context(R|Foo|, R|Bar|)
+            public final fun test(): R|kotlin/Unit|
+                Type: Bar
+                Label: Bar
+    Element 8
+        Scope: FirLocalScope
+
+FILE: [ResolvedTo(IMPORTS)] contextReceivers.kt
+    public final? [ResolvedTo(RAW_FIR)] interface Foo : R|kotlin/Any| {
+        public? final? [ResolvedTo(RAW_FIR)] fun foo(): Int
+
+    }
+    public final? [ResolvedTo(RAW_FIR)] interface Bar : R|kotlin/Any| {
+        public? final? [ResolvedTo(RAW_FIR)] fun bar(): Int
+
+    }
+    context(R|Foo|, R|Bar|)
+    public final [ResolvedTo(BODY_RESOLVE)] fun test(): R|kotlin/Unit| {
+        this@R|/test|.R|/Foo.foo|().R|kotlin/Int.plus|(this@R|/test|.R|/Bar.bar|())
+    }