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

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

@@ -0,0 +1,28 @@
+// !CHECK_TYPE
+
+interface G {
+    operator fun get(x: Int, y: Int): Int = x + y
+    operator fun set(x: Int, y: Int, value: Int) {}
+}
+
+fun foo1(a: Int?, b: G) {
+    b[a!!, a!!] = a
+    checkSubtype<Int>(a)
+}
+
+fun foo2(a: Int?, b: G) {
+    b[0, a!!] = a
+    checkSubtype<Int>(a)
+}
+
+fun foo3(a: Int?, b: G) {
+    val r = b[a!!, a]
+    checkSubtype<Int>(a)
+    checkSubtype<Int>(r)
+}
+
+fun foo4(a: Int?, b: G) {
+    val r = b[0, a!!]
+    checkSubtype<Int>(a)
+    checkSubtype<Int>(r)
+}