JVM_IR: introduce modes for IR serialization

Instead of a Boolean flag -Xserialize-ir, use modes: none,inline,all.
In "inline" mode, only information needed to deserialize bodies of inline
functions is serialized.
In the "all" mode, all declarations are serialized completely.

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.kt

@@ -488,9 +488,10 @@ default: `indy-with-constants` for JVM target 9 or greater, `inline` otherwise""
 
     @Argument(
         value = "-Xserialize-ir",
+        valueDescription = "{none|inline|all}",
         description = "Save IR to metadata (EXPERIMENTAL)"
     )
-    var serializeIr: Boolean by FreezableVar(false)
+    var serializeIr: String by FreezableVar("none")
 
     @Argument(
         value = "-Xvalidate-ir",