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

compiler/testData/diagnostics/tests/controlFlowAnalysis/infiniteLoops.fir.kt

@@ -0,0 +1,55 @@
+fun unreachable() {}
+
+fun a() {
+    do {
+    } while (true)
+    unreachable()
+}
+
+fun b() {
+    while (true) {
+    }
+    unreachable()
+}
+
+fun c() {
+    do {} while (1 == 1)
+}
+
+fun d() {
+    while (2 == 2) {}
+}
+
+fun use(arg: Any) = arg
+
+fun f(cond: Boolean) {
+    val bar: Any
+    do {
+        if (cond) {
+            bar = "value"
+            break
+        }
+    } while (true)
+    use(bar) // should work
+
+    val foo: Any
+    while (true) {
+        if (cond) {
+            foo = "value"
+            break
+        }
+    }
+    use(foo) // should work
+}
+
+fun g(): Int {
+    do {
+        if (true) return 12
+    } while (true)
+} // should work
+
+fun h(): Int {
+    while (true) {
+        if (true) return 12
+    }
+} // should work