Drop cli-parser, use simple reflection-based parser instead

The main reason of this change is that major changes are required in how
command line arguments are parsed in kotlinc, and it's much easier to
make them in our own codebase (given that the code is short and simple
enough) than in a third-party library

generators/src/org/jetbrains/kotlin/generators/arguments/GenerateGradleOptions.kt

@@ -17,20 +17,19 @@
 package org.jetbrains.kotlin.generators.arguments
 
 import org.jetbrains.kotlin.cli.common.arguments.*
-import org.jetbrains.kotlin.cli.common.parser.com.sampullara.cli.Argument
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.utils.Printer
 import java.io.File
 import java.io.PrintStream
 import kotlin.reflect.KAnnotatedElement
 import kotlin.reflect.KProperty1
-import kotlin.reflect.declaredMemberProperties
+import kotlin.reflect.full.declaredMemberProperties
 
 // Additional properties that should be included in interface
 @Suppress("unused")
 interface AdditionalGradleProperties {
     @GradleOption(EmptyList::class)
-    @Argument(description = "A list of additional compiler arguments")
+    @Argument(value = "", description = "A list of additional compiler arguments")
     var freeCompilerArgs: List<String>
 
     object EmptyList : DefaultValues("emptyList()")