Use yaml instead of json for registry center & Support registry center for Proxy.

[tristaZero]

Fixes #935 #936 .

Changes proposed in this pull request:

• Add Sharding yaml representer.

• Add Sharding yaml converter.

• Add Sharding zk processing.

• Add Sharding listener.

• Add ms yaml representer.

• Add ms yaml converter.

• Add ms zk processing.

• Add ms listener.

• Add proxy representer.

• Add proxy converter.

• Add proxy zk processing.

• Add proxy listener.

• Add proxy registry.

• Add eventbus for proxy.

[codecov-io]

Codecov Report

Merging #948 into dev will decrease coverage by 0.61%.
The diff coverage is 30.03%.

@@            Coverage Diff             @@
##              dev     #948      +/-   ##
==========================================
- Coverage   53.59%   52.98%   -0.62%     
==========================================
  Files         565      577      +12     
  Lines       11831    12114     +283     
  Branches     1875     1916      +41     
==========================================
+ Hits         6341     6418      +77     
- Misses       5125     5325     +200     
- Partials      365      371       +6

Impacted Files	Coverage Δ
...chestration/internal/config/ConfigurationNode.java	100% <ø> (ø)	⬆️
...sphere/proxy/config/ProxyRawDataSourceFactory.java	0% <ø> (ø)	⬆️
...ation/internal/eventbus/ProxyEventBusInstance.java	0% <0%> (ø)
...aml/representer/ProxyConfigurationRepresenter.java	0% <0%> (ø)
...ml/sharding/YamlShardingStrategyConfiguration.java	45.65% <0%> (-41.85%)	⬇️
.../internal/config/ConfigurationListenerManager.java	56.75% <0%> (-18.25%)	⬇️
...al/state/datasource/DataSourceListenerManager.java	40% <0%> (-10%)	⬇️
...ternal/state/instance/InstanceListenerManager.java	32.35% <0%> (-6.11%)	⬇️
...chestration/internal/listener/ListenerFactory.java	76.19% <0%> (-23.81%)	⬇️
.../internal/state/instance/InstanceStateService.java	81.81% <0%> (-18.19%)	⬇️
... and 39 more

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