[FIR-TEST] Move analysis tests to separate module

compiler/fir/analysis-tests/testData/resolve/cfg/complex.kt

@@ -0,0 +1,22 @@
+// !DUMP_CFG
+interface AutoCloseable {
+    fun close()
+}
+
+fun Throwable.addSuppressed(other: Throwable) {}
+
+internal fun AutoCloseable?.closeFinally(cause: Throwable?) = when {
+    this == null -> {}
+    cause == null -> close()
+    else ->
+        try {
+            close()
+        } catch (closeException: Throwable) {
+            cause.addSuppressed(closeException)
+        }
+}
+
+inline fun <reified T : Any> List<*>.firstIsInstanceOrNull(): T? {
+    for (element in this) if (element is T) return element
+    return null
+}