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GH-34643: [CI] Fix files used for testing uncompressible data (#34646)

### What changes are included in this PR?

Fix the test files so they aren't duplicates (which appears to confuse the fuzzer)

### Are these changes tested?

They are used in integration tests

### Are there any user-facing changes?

No
* Closes: #34643

Authored-by: David Li <li.davidm96@gmail.com>
Signed-off-by: Will Jones <willjones127@gmail.com>