[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/dataFlowInfoTraversal/ArrayIndices.fir.kt

@@ -0,0 +1,11 @@
+// !CHECK_TYPE
+
+fun foo1(a: Int?, b: Array<Array<Int>>) {
+    b[a!!][a!!] = a
+    checkSubtype<Int>(a)
+}
+
+fun foo2(a: Int?, b: Array<Array<Int>>) {
+    b[0][a!!] = a
+    checkSubtype<Int>(a)
+}