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/config.jvm/src/org/jetbrains/kotlin/config/JVMConfigurationKeys.java

@@ -145,8 +145,8 @@ public class JVMConfigurationKeys {
     public static final CompilerConfigurationKey<Boolean> NO_REFLECT =
             CompilerConfigurationKey.create("Don't automatically include kotlin-reflect.jar into the output if the output is a jar");
 
-    public static final CompilerConfigurationKey<Boolean> SERIALIZE_IR =
-            CompilerConfigurationKey.create("Serialize IR to class metadata");
+    public static final CompilerConfigurationKey<JvmSerializeIrMode> SERIALIZE_IR =
+            CompilerConfigurationKey.create("What functions to serialize as IR to class metadata");
 
     public static final CompilerConfigurationKey<Boolean> VALIDATE_IR =
             CompilerConfigurationKey.create("Validate IR");

compiler/config.jvm/src/org/jetbrains/kotlin/config/JvmSerializeIrMode.kt

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.config
+
+enum class JvmSerializeIrMode(val description: String) {
+    NONE("none"),
+    INLINE("inline"),
+    ALL("all");
+
+    companion object {
+        @JvmStatic
+        fun fromStringOrNull(string: String) = values().find { it.description == string }
+
+        @JvmStatic
+        fun fromString(string: String) = fromStringOrNull(string) ?: NONE
+    }
+}