Fix: some bugs and features for 3.0

[LaurenceLiZhixin]

• 1. Triple-grpc Error response ：triple 异常回传支持
• 2. Triple-grpc Attachment ：triple 请求和相应attachemnt 支持
• 3. ZK Consumer Registry bug: zk consumer registry node should under /$group/interface/consumers/
• 4. ZK Update event log level every some seconds, info -> debug.
• 5. remove unused file/k8s registry and remote
• 6. 组合结构客户端接口支持：

var grpcGreeterImplWithCustomGroupAndVersion = &UserProviderWithCustomGroupAndVersion{GreeterClientImpl: api.GreeterClientImpl{}}

// UserProviderWithCustomGroupAndVersion 组合接口
type UserProviderWithCustomGroupAndVersion struct {
	api.GreeterClientImpl
}

func init() {
	config.SetConsumerService(grpcGreeterImplWithCustomGroupAndVersion)
}

[codecov-commenter]

Codecov Report

Merging #1586 (ec64ec0) into 3.0 (3182c7a) will decrease coverage by 0.61%.
The diff coverage is 18.75%.

@@            Coverage Diff             @@
##              3.0    #1586      +/-   ##
==========================================
- Coverage   41.76%   41.15%   -0.62%     
==========================================
  Files         258      250       -8     
  Lines       15131    14277     -854     
==========================================
- Hits         6320     5875     -445     
+ Misses       8078     7718     -360     
+ Partials      733      684      -49     

Impacted Files	Coverage Δ
config_center/nacos/listener.go	50.00% <ø> (ø)
protocol/dubbo3/dubbo3_protocol.go	68.26% <0.00%> (+2.52%)	⬆️
registry/base_registry.go	1.27% <0.00%> (ø)
remoting/zookeeper/listener.go	0.00% <0.00%> (ø)
common/proxy/proxy.go	76.11% <20.00%> (-5.19%)	⬇️
protocol/dubbo3/dubbo3_invoker.go	60.86% <25.00%> (-4.99%)	⬇️
metrics/prometheus/reporter.go	28.57% <0.00%> (+1.71%)	⬆️
filter/gshutdown/filter.go	62.16% <0.00%> (+2.16%)	⬆️

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