Fix zombienet-polkadot-functional-0014-chunk-fetching-network-compatibility

[DenzelPenzel]

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Description of bug

This test was created to check the compatibility with nodes that doesn't speak /req_chunk/2 protocol.

This test failed with the next issue:

2025-10-08 11:18:13.105 DEBUG tokio-runtime-worker sub-libp2p::request-response: OnHeap("/010d8c7b5c5143d5cb5ba7adbae2378b393842664dd9271a6634532189fc174a/req_attested_candidate/2"): request failed for PeerId("12D3KooWKJjGSTFrKLcYQU47C5pt628desaQ2gitY8aXxCpRq7xC") (RequestId(112)): Rejected(SubstreamClosed)    

 Error:  
	 Timeout(100), "getting log pattern Trying the fallback protocol within 100 secs".


 Error:  
	 Timeout(100), "getting log pattern Trying the fallback protocol within 100 secs".

Observations:
Network protocol does not have a fallback request, test looks for fallback on the req_chunk protocol.

Steps to reproduce

trigger-zombienet-polkadot / zombienet-polkadot-functional-0014-chunk-fetching-network-compatibility

[DenzelPenzel]

This test has been temporarily disabled and added to the flaky test registry for investigation #9957