[IR][tests] Rename top-level declarations in visibility-related tests to distinguish them from nested declarations

compiler/testData/klibABI/changePropertyVisibility/lib1/l1.kt

@@ -1,7 +1,7 @@
-public val publicToInternalProperty1 = 42
-public val publicToInternalProperty2 get() = 42
-public val publicToPrivateProperty1 = 42
-public val publicToPrivateProperty2 get() = 42
+public val publicToInternalTopLevelProperty1 = 42
+public val publicToInternalTopLevelProperty2 get() = 42
+public val publicToPrivateTopLevelProperty1 = 42
+public val publicToPrivateTopLevelProperty2 get() = 42
 
 open class Container {
     public val publicToProtectedProperty1 = 42

compiler/testData/klibABI/changePropertyVisibility/lib1/l1.kt.1

@@ -1,7 +1,7 @@
-internal val publicToInternalProperty1 = 42
-internal val publicToInternalProperty2 get() = 42
-private val publicToPrivateProperty1 = 42
-private val publicToPrivateProperty2 get() = 42
+internal val publicToInternalTopLevelProperty1 = 42
+internal val publicToInternalTopLevelProperty2 get() = 42
+private val publicToPrivateTopLevelProperty1 = 42
+private val publicToPrivateTopLevelProperty2 get() = 42
 
 open class Container {
     protected val publicToProtectedProperty1 = 42