Support main entry-point without arguments in frontend

#KT-26574 In Progress

idea/testData/run/MainInTest/module/src/parameterlessInObject.kt

@@ -0,0 +1,15 @@
+package parameterless
+
+class A {
+    companion object {
+        @JvmStatic
+        fun main() { // no
+        }
+    }
+}
+
+object B {
+    @JvmStatic
+    fun main() { // no
+    }
+}

idea/testData/run/MainInTest/module/src/parameterlessInvalid.kt

@@ -0,0 +1,9 @@
+// entryPointExists
+package parameterlessInvalid
+
+fun main() { // no
+}
+
+@JvmName("main")
+fun notMain(args: Array<String>) { // yes
+}

idea/testData/run/MainInTest/module/src/parameterlessValid.kt

@@ -0,0 +1,4 @@
+package parameterless
+
+fun main() { // yes
+}

idea/testData/run/MainInTest/module/src/parameterlessWithJvmName.kt

@@ -0,0 +1,5 @@
+package parameterlessWithJvmName
+
+@JvmName("main")
+fun notMain() { // no
+}