Add support for io.netty:netty-transport-classes-epoll:4.1.99.Final

[linghengqian]

Is your feature request related to a problem? Please describe.
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• Yes, refer to Add support for io.etcd:jetcd-core:0.7.5 #164 .

Describe the solution you'd like
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• Add support for io.netty:netty-transport-classes-epoll:4.1.99.Final.

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• Null.

Additional context
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• I completed the nativeTest verification of io.etcd:jetcd-core:0.7.5 in GraalVM CE at Add GraalVM Reachability Metadata and corresponding nativeTest for Etcd integration apache/shardingsphere#29755 , which is missing the following JSON in reflect-config.json entry.

[
{
  "condition":{"typeReachable":"io.netty.channel.epoll.EpollChannelOption"},
  "name":"io.netty.channel.epoll.EpollChannelOption",
  "fields":[{"name":"TCP_USER_TIMEOUT"}]
}
]

[linghengqian]

• I'm working on this issue.