[CLI] Introduce new compiler arguments for registering compiler plugins

With new syntax each plugin should be registered in separate argument with syntax
`-Xcompiler-plugin=classpath1,classpath2[=argument1=value1,argument2=value2]`

compiler/plugin-api/src/org/jetbrains/kotlin/compiler/plugin/CliOptions.kt

@@ -44,6 +44,8 @@ class PluginCliOptionProcessingException(
     cause: Throwable? = null
 ) : CliOptionProcessingException(message, cause)
 
+class PluginProcessingException(message: String, cause: Throwable? = null) : RuntimeException(message, cause)
+
 fun cliPluginUsageString(pluginId: String, options: Collection<AbstractCliOption>): String {
     val LEFT_INDENT = 2
     val MAX_OPTION_WIDTH = 26
@@ -73,7 +75,7 @@ data class CliOptionValue(
     override fun toString() = "$pluginId:$optionName=$value"
 }
 
-fun parsePluginOption(argumentValue: String): CliOptionValue? {
+fun parseLegacyPluginOption(argumentValue: String): CliOptionValue? {
     val pattern = Pattern.compile("""^plugin:([^:]*):([^=]*)=(.*)$""")
     val matcher = pattern.matcher(argumentValue)
     if (matcher.matches()) {
@@ -83,6 +85,16 @@ fun parsePluginOption(argumentValue: String): CliOptionValue? {
     return null
 }
 
+fun parseModernPluginOption(argumentValue: String): CliOptionValue? {
+    val pattern = Pattern.compile("""^([^=]*)=(.*)$""")
+    val matcher = pattern.matcher(argumentValue)
+    if (matcher.matches()) {
+        return CliOptionValue("<NO_ID>", matcher.group(1), matcher.group(2))
+    }
+
+    return null
+}
+
 fun getPluginOptionString(pluginId: String, key: String, value: String): String {
     return "plugin:$pluginId:$key=$value"
 }