add registry metrics

[FinalT]

dubbo_register_service_rt_milliseconds_avg
dubbo_register_service_rt_milliseconds_last
dubbo_register_service_rt_milliseconds_max
dubbo_register_service_rt_milliseconds_min
dubbo_register_service_rt_milliseconds_sum

dubbo_registry_directory_num_all
dubbo_registry_directory_num_disable_total
dubbo_registry_directory_num_to_reconnect_total
dubbo_registry_directory_num_valid_total

dubbo_registry_notify_num_last
dubbo_registry_notify_requests_total

dubbo_register_rt_milliseconds_max
dubbo_register_rt_milliseconds_avg
dubbo_register_rt_milliseconds_sum
dubbo_register_rt_milliseconds_min
dubbo_register_rt_milliseconds_last

dubbo_registry_register_requests_succeed_total
dubbo_registry_register_requests_total
dubbo_registry_register_requests_failed_total

dubbo_registry_register_service_total
dubbo_registry_register_service_succeed_total
dubbo_registry_register_service_failed_total
dubbo_registry_subscribe_num_failed_total
dubbo_registry_subscribe_num_succeed_total

dubbo_registry_subscribe_num_total
dubbo_registry_subscribe_service_num_total
dubbo_registry_subscribe_service_num_succeed_total
dubbo_registry_subscribe_service_num_failed_total

dubbo_notify_rt_milliseconds_avg
dubbo_notify_rt_milliseconds_last
dubbo_notify_rt_milliseconds_max
dubbo_notify_rt_milliseconds_min
dubbo_notify_rt_milliseconds_sum

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov-commenter]

Codecov Report

Merging #2366 (8592e11) into feature-metrics (d0c3564) will decrease coverage by 0.04%.
The diff coverage is 43.75%.

❗ Current head 8592e11 differs from pull request most recent head 642e0e0. Consider uploading reports for the commit 642e0e0 to get more accurate results

@@                 Coverage Diff                 @@
##           feature-metrics    #2366      +/-   ##
===================================================
- Coverage            44.11%   44.07%   -0.04%     
===================================================
  Files                  304      304              
  Lines                18430    18446      +16     
===================================================
  Hits                  8130     8130              
- Misses                9445     9462      +17     
+ Partials               855      854       -1     

Files Changed	Coverage Δ
registry/base_registry.go	1.39% <0.00%> (-0.02%)	⬇️
...try/servicediscovery/service_discovery_registry.go	0.95% <0.00%> (-0.02%)	⬇️
registry/nacos/registry.go	42.51% <66.66%> (+0.44%)	⬆️
registry/directory/directory.go	73.49% <71.42%> (-0.06%)	⬇️

... and 2 files with indirect coverage changes

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[chickenlj]

LGTM.