[Analysis API] Add more ContextCollector tests inspired by on-air tests

As the on-air analysis is obsolete, related tests are going to be
deleted. Here we add cases not yet covered by 'ContextCollector' tests.

analysis/low-level-api-fir/testData/contextCollector/enumValuePropertyAccessor.kt

@@ -0,0 +1,23 @@
+enum class Direction {
+    NORTH {
+        override val code: Int
+            get() = 1
+    },
+
+    EAST {
+        override val code: Int
+            get() = <expr>2</expr>
+    },
+
+    SOUTH {
+        override val code: Int
+            get() = 3
+    },
+
+    WEST {
+        override val code: Int
+            get() = 4
+    };
+
+    abstract val code: Int
+}