ORC-2190: [C++] Reject compressed chunk length exceeding block size in C++ reader

[dongjoon-hyun]

What changes were proposed in this pull request?

This PR makes the ORC C++ reader reject a compressed chunk whose length exceeds the configured
compression block size, matching the Java reader.

orc/java/core/src/java/org/apache/orc/impl/InStream.java

Lines 504 to 507 in 5d3cf13

	if (chunkLength > bufferSize) {
	throw new IllegalArgumentException("Buffer size too small. size = " +
	bufferSize + " needed = " + chunkLength + " in " + name);
	}

Why are the changes needed?

The Java reader already performs this check in InStream.CompressedStream.readHeader, but the C++
reader was missing it. This is a defense-in-depth hardening (not a CVE): the chunk length is already
bounded to ~8MB by the 3-byte header, but the spec-mandated first check was absent on the C++ side.
Well-formed files are unaffected.

How was this patch tested?

Pass the CIs with the newly added test case.

Was this patch authored or co-authored using generative AI tooling?

Generated-by: Claude Fable 5