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/testData/cli/jvm/extraHelp.out

@@ -107,7 +107,8 @@ where advanced options include:
                              problems with parentheses in identifiers on certain platforms
   -Xscript-resolver-environment=<key=value[,]>
                              Script resolver environment in key-value pairs (the value could be quoted and escaped)
-  -Xserialize-ir             Save IR to metadata (EXPERIMENTAL)
+  -Xserialize-ir={none|inline|all}
+                             Save IR to metadata (EXPERIMENTAL)
   -Xsingle-module            Combine modules for source files and binary dependencies into a single module
   -Xskip-runtime-version-check Allow Kotlin runtime libraries of incompatible versions in the classpath
   -Xgenerate-strict-metadata-version