Remove IDisposable pattern where not needed

[masesdevelopers]

This is a known problem that does not depends directly from KNet: the classes developed in this project applies the IDisposable pattern where it is necessary, however most classes are generated from JNetReflector which adds the needed interfaces and superclasses. The Headers class is correctly defined following the one defined in the JVM:
https://github.com/masesgroup/KNet/blob/75395a6977d617eb6b05964fa6814e0db76deca6/src/net/KNet/Generated/Org/Apache/Kafka/Common/Header/Headers.cs#L32
Iterable is a class defined in JNet to support the foreach operations in C#: it has a deep inheritance hierarchy that ultimately leads to a class implementing IDisposable. The best place for this discussion is in JNet or is ancestor in the hierarchy.

Originally posted by @masesdevelopers in #1460

[masesdevelopers]

The class JVMBridgeBase, which is the root of all classes as partially reported in masesgroup/KNet#1460, implements the IDisposable and it cannot be removed without a modification in JCOBridge. The issue shall be forwarded to JCOBridge and, if a modification will be available, JNetReflector can be updated to set IDisposable pattern when an AutoCloaseable class is in the inheritance chain.