optimize: use curator instead of zkclient in config model

[leizhiyuan]

• I have registered the PR changes.

Ⅰ. Describe what this PR did

fiees #6772

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

test case

Ⅴ. Special notes for reviews

[funky-eyes]

Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:testCompile (default-testCompile) on project seata-config-zk: Compilation failure: Compilation failure:
Error: /home/runner/work/incubator-seata/incubator-seata/config/seata-config-zk/src/test/java/org/apache/seata/config/zk/ZkConfigurationTest.java:[21,31] package org.apache.curator.test does not exist
Error: /home/runner/work/incubator-seata/incubator-seata/config/seata-config-zk/src/test/java/org/apache/seata/config/zk/ZkConfigurationTest.java:[35,22] cannot find symbol
Error: symbol: class TestingServer
Error: location: class org.apache.seata.config.zk.ZkConfigurationTest
Error: /home/runner/work/incubator-seata/incubator-seata/config/seata-config-zk/src/test/java/org/apache/seata/config/zk/ZkConfigurationTest.java:[41,22] cannot find symbol
Error: symbol: class TestingServer
Error: location: class org.apache.seata.config.zk.ZkConfigurationTest
Error: -> [Help 1]

[codecov]

Codecov Report

Attention: Patch coverage is 52.21239% with 54 lines in your changes missing coverage. Please review.

Project coverage is 52.30%. Comparing base (fa6bdda) to head (4328e05).
Report is 2 commits behind head on 2.x.

Files with missing lines	Patch %	Lines
...apache/seata/config/zk/ZookeeperConfiguration.java	52.67%	47 Missing and 6 partials ⚠️
.../apache/seata/config/ConfigurationChangeEvent.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                2.x    #6779      +/-   ##
============================================
- Coverage     52.38%   52.30%   -0.09%     
- Complexity     6384     6407      +23     
============================================
  Files          1081     1083       +2     
  Lines         37617    37848     +231     
  Branches       4464     4493      +29     
============================================
+ Hits          19706    19796      +90     
- Misses        15961    16081     +120     
- Partials       1950     1971      +21     

Files with missing lines	Coverage Δ
.../apache/seata/config/ConfigurationChangeEvent.java	96.29% <0.00%> (-3.71%)	⬇️
...apache/seata/config/zk/ZookeeperConfiguration.java	42.03% <52.67%> (ø)

... and 8 files with indirect coverage changes

[funky-eyes]

@leizhiyuan Please fix the ci problem.

[funky-eyes]

https://github.com/apache/incubator-seata/blob/2.x/changes/zh-cn/2.x.md
https://github.com/apache/incubator-seata/blob/2.x/changes/en-us/2.x.md
请在上述md文件中登记pr信息和作者信息
Please register pr information and author information in the above md file

[funky-eyes]

Error: Failures:
Error: ZkConfigurationTest.testPutConfig:83 expected: but was:
[INFO]
Error: Tests run: 3, Failures: 1, Errors: 0, Skipped: 0
[INFO]

[leizhiyuan]

Error: Failures: Error: ZkConfigurationTest.testPutConfig:83 expected: but was: [INFO] Error: Tests run: 3, Failures: 1, Errors: 0, Skipped: 0 [INFO]

It seems to have something to do with the environment.,Local mac has always passed.,I'll find a Linux machine to run it.

[leizhiyuan]

run ok in linux。。

[funky-eyes]

LGTM