Support main entry-point without arguments in JVM

#KT-26574 In Progress

compiler/testData/integration/smoke/helloAppOldAndParameterlessMain/hello.compile.expected

@@ -0,0 +1 @@
+Return code: 0

compiler/testData/integration/smoke/helloAppOldAndParameterlessMain/hello.kt

@@ -0,0 +1,9 @@
+package Hello
+
+fun main(args: Array<String>) {
+    System.out.println("Hello!")
+}
+
+fun main() {
+    System.out.println("Fail")
+}

compiler/testData/integration/smoke/helloAppOldAndParameterlessMain/hello.run.expected

@@ -0,0 +1,4 @@
+OUT:
+Hello!
+
+Return code: 0

compiler/testData/integration/smoke/helloAppParameterlessMain/hello.compile.expected

@@ -0,0 +1 @@
+Return code: 0

compiler/testData/integration/smoke/helloAppParameterlessMain/hello.kt

@@ -0,0 +1,5 @@
+package Hello
+
+fun main() {
+    System.out.println("Hello!")
+}

compiler/testData/integration/smoke/helloAppParameterlessMain/hello.run.expected

@@ -0,0 +1,4 @@
+OUT:
+Hello!
+
+Return code: 0

compiler/testData/integration/smoke/helloAppSuspendParameterlessMain/hello.compile.expected

@@ -0,0 +1 @@
+Return code: 0

compiler/testData/integration/smoke/helloAppSuspendParameterlessMain/hello.kt

@@ -0,0 +1,36 @@
+package Hello
+
+import kotlin.concurrent.thread
+import kotlin.coroutines.suspendCoroutine
+import kotlin.coroutines.resume
+import kotlin.reflect.jvm.javaMethod
+
+@kotlin.jvm.Volatile
+private var result = ""
+@kotlin.jvm.Volatile
+private var callback: Function0<Unit>? = null
+
+suspend fun appendAndSuspend(s: String) {
+    result += s
+
+    suspendCoroutine<Unit> { continuation ->
+        callback = {
+            continuation.resume(Unit)
+        }
+    }
+}
+
+suspend fun main() {
+    thread(isDaemon = true) {
+        while (true) {
+            val c = callback
+            c?.invoke()
+            Thread.sleep(500)
+        }
+    }
+
+    appendAndSuspend("O")
+    appendAndSuspend("K")
+    println(result)
+    callback = null
+}

compiler/testData/integration/smoke/helloAppSuspendParameterlessMain/hello.run.expected

@@ -0,0 +1,4 @@
+OUT:
+OK
+
+Return code: 0