Fix //test/common/network:multi_connection_base_impl_test on big endian

[namrata-ibm]

Commit Message: Additional Description: The Hashkey subtest fais when comparing the specific elements in id_array and hash_key vector. Byte-swapping the id_array resolves the issue. Risk Level: Testing: Docs Changes: Release Notes: Platform Specific Features: [Optional Runtime guard:] [Optional Fixes #Issue] [Optional Fixes commit #PR or SHA] [Optional Deprecated:] [Optional API Considerations:]

[repokitteh-read-only[bot]]

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Caused by: https://github.com/envoyproxy/envoy/pull/34442 was opened by namrata-ibm.

see: more, trace.