8340409: [lworld] Simple serialization and deserialization of core migrated classes

[RogerRiggs]

Serialization and deerialization of value classes. For java.base value classes migrated from identity classes:

• Must be annotated with jdk.internal.MigratedValueClass (in tests too)
• Must have a constructor or static factory method:
  • annotated with jdk.internal.value.DeserializeConstrucctor
  • constructor parameters must match order and types of serializable fields of the class
• Value class must not have superclass with fields; only Object or abstract w/o fields
• Uses same technique as for Records to extract and concat values from stream to invoke constructor
• Migrated value classes are serialized using the same format/fields as the identity class

Non-migrated value classes throw InvalidClassException

Along the way, refactored code to break out different modes of deserialization: full custom deserialization with custom data, default deserialization only, externalizable, no local class, record, and then added mode to deserialize a value class.

Updates to value class tests and added a combo test to check many combinations of value and identity classes with different parameters.

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Progress

• [x] Change must not contain extraneous whitespace

Issue

• JDK-8340409: [lworld] Simple serialization and deserialization of core migrated classes (Bug - P4)

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