fix: registry cast to AbstractRegistry error in telnet

[leizhiyuan]

What is the purpose of the change

fix #8614

Brief changelog

Verifying this change

Checklist

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[codecov-commenter]

Codecov Report

Merging #8619 (699953c) into 3.0 (9a0629c) will decrease coverage by 0.52%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##                3.0    #8619      +/-   ##
============================================
- Coverage     63.87%   63.34%   -0.53%     
+ Complexity      314      312       -2     
============================================
  Files          1169     1178       +9     
  Lines         49239    49807     +568     
  Branches       7366     7452      +86     
============================================
+ Hits          31450    31551     +101     
- Misses        14368    14807     +439     
- Partials       3421     3449      +28     

Impacted Files	Coverage Δ
...ubbo/registry/client/ServiceDiscoveryRegistry.java	81.37% <100.00%> (-0.50%)	⬇️
...he/dubbo/common/logger/support/FailsafeLogger.java	52.80% <0.00%> (-26.47%)	⬇️
.../apache/dubbo/common/context/LifecycleAdapter.java	25.00% <0.00%> (-25.00%)	⬇️
...ain/java/org/apache/dubbo/config/ModuleConfig.java	70.37% <0.00%> (-16.30%)	⬇️
.../remoting/transport/netty4/NettyServerHandler.java	62.79% <0.00%> (-9.31%)	⬇️
...ng/transport/dispatcher/all/AllChannelHandler.java	82.75% <0.00%> (-6.90%)	⬇️
...dubbo/remoting/exchange/support/DefaultFuture.java	88.28% <0.00%> (-4.51%)	⬇️
.../apache/dubbo/remoting/transport/AbstractPeer.java	58.69% <0.00%> (-4.35%)	⬇️
...ng/transport/dispatcher/WrappedChannelHandler.java	63.04% <0.00%> (-4.35%)	⬇️
...he/dubbo/remoting/transport/netty/NettyServer.java	70.17% <0.00%> (-3.51%)	⬇️
... and 42 more

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[AlbumenJ]

Please change some methods implementation to template method from FailbackRegistry.

    public abstract void doRegister(URL url);

    public abstract void doUnregister(URL url);

    public abstract void doSubscribe(URL url, NotifyListener listener);

    public abstract void doUnsubscribe(URL url, NotifyListener listener);

[CrazyHZM]

@leizhiyuan Please resolve the conflict.

[leizhiyuan]

@leizhiyuan Please resolve the conflict.

done