Delay UNUSED_PARAMETER on main parameter until 1.4 (part of KT-26999)

compiler/testData/diagnostics/tests/controlFlowAnalysis/mainWith12.kt

@@ -1,5 +0,0 @@
-// !LANGUAGE: -ExtendedMainConvention
-
-fun main(args: Array<String>) {
-
-}

compiler/testData/diagnostics/tests/controlFlowAnalysis/mainWithWarningOnUnusedParam.kt

@@ -1,3 +1,5 @@
+// !LANGUAGE: +WarningOnMainUnusedParameter
+
 fun main(<!UNUSED_PARAMETER!>args<!>: Array<String>) {
 
 }

compiler/testData/diagnostics/tests/controlFlowAnalysis/mainWithoutWarningOnUnusedParam.kt

@@ -0,0 +1,5 @@
+// !LANGUAGE: -WarningOnMainUnusedParameter
+
+fun main(args: Array<String>) {
+
+}

compiler/testData/diagnostics/tests/redeclarations/RedeclarationMainInFile.kt

@@ -1,4 +1,4 @@
 // KT-9733 No error shown for 2 "main" functions in the same file
 
-<!CONFLICTING_OVERLOADS!>fun main(<!UNUSED_PARAMETER!>args<!>: Array<String>)<!> {}
-<!CONFLICTING_OVERLOADS!>fun main(<!UNUSED_PARAMETER!>args<!>: Array<String>)<!> {}
+<!CONFLICTING_OVERLOADS!>fun main(args: Array<String>)<!> {}
+<!CONFLICTING_OVERLOADS!>fun main(args: Array<String>)<!> {}

compiler/testData/diagnostics/tests/redeclarations/RedeclarationParameterlessMainInvalid.kt

@@ -1,7 +1,7 @@
 // FILE: a.kt
 <!CONFLICTING_OVERLOADS!>fun main()<!> {}
 
-suspend fun main(<!UNUSED_PARAMETER!>args<!>: Array<String>) {}
+suspend fun main(args: Array<String>) {}
 
 // FILE: b.kt
 <!CONFLICTING_OVERLOADS!>fun main()<!> {}