Add test for KT-17479 looks like #KT-17479 Fixed

(after CAPTURED_MEMBER_VAL_INITIALIZATION introduction)

compiler/testData/diagnostics/tests/controlFlowAnalysis/initializationInLocalViaExplicitThis.kt

@@ -0,0 +1,17 @@
+// See KT-17479
+
+class Test {
+    val str: String
+    init {
+        run {
+            <!CAPTURED_MEMBER_VAL_INITIALIZATION!>this@Test.str<!> = "A"
+        }
+
+        run {
+            // Not sure do we need diagnostic also here
+            this@Test.str = "B"
+        }
+
+        str = "C"
+    }
+}

compiler/testData/diagnostics/tests/controlFlowAnalysis/initializationInLocalViaExplicitThis.txt

@@ -0,0 +1,9 @@
+package
+
+public final class Test {
+    public constructor Test()
+    public final val str: kotlin.String
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}