Fix maven build + ~50 compiler tests broken by UNUSED_PARAMETER in main

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

@@ -1,5 +1,5 @@
 package Hello
 
-fun main(args : Array<String>) {
+fun main() {
     a
 }

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

@@ -1,5 +1,5 @@
 package Hello
 
-fun main(args : Array<String>) {
+fun main() {
     System.out.println("Hello!")
 }

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

@@ -1,5 +1,6 @@
 package Hello
 
 fun main(args: kotlin.Array<kotlin.String>) {
+    args.size
     System.out.println("Hello from fully qualified main!")
 }

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

@@ -1,6 +1,7 @@
 package Hello
 
 fun main(args: Array<String>) {
+    args.size
     System.out.println("Hello!")
 }
 

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

@@ -1,5 +1,6 @@
 package Hello
 
 fun main(vararg args: kotlin.String) {
+    args.size
     System.out.println("Hello from vararg main!")
 }

compiler/testData/integration/smoke/inlineOnly/inlineOnly.kt

@@ -1,5 +1,5 @@
 package InlineOnly
 
-fun main(args : Array<String>) {
-    error("my error")
+fun main(args: Array<String>) {
+    error("my error: ${args.size}")
 }

compiler/testData/integration/smoke/inlineOnly/inlineOnly.run.expected

@@ -1,6 +1,6 @@
 
 ERR:
-Exception in thread "main" java.lang.IllegalStateException: my error
+Exception in thread "main" java.lang.IllegalStateException: my error: 0
 	at InlineOnly.InlineOnlyKt.main(inlineOnly.kt:4)
 
 Return code: 1