[THRIFT-5916] Enforce recursion depth limit in Java for C++ parity

[mhlakhani]

Java had TConfiguration.recursionLimit (default 64) and TProtocolException.DEPTH_LIMIT defined but the limit was not actually enforced during struct deserialization. This brings Java in line with C++ which already enforces recursion limits.

Changes:

• Add recursionDepth_ counter and increment/decrement methods to TProtocol
• Modify Java code generator to emit try-finally depth tracking in generate_standard_reader() and generate_java_struct_tuple_reader()

Structures exceeding the configured recursion limit now throw TProtocolException(DEPTH_LIMIT) during deserialization.

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