[ISSUE#12583] ProtocolManager代码优化

[HMYDK]

What is the purpose of the change

fix #12583 ProtocolManager可能导致的并发问题

Brief changelog

• getCpProtocol()和getApProtocol()的内部实现不再锁住当前对象
• volatile修饰apInit和cpInit
• 修改ApplicationUtils.getBeanIfExist，保证异常正常抛出

Verifying this change

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 69.65%. Comparing base (98a6e22) to head (26c440f).
Report is 11 commits behind head on develop.

Files with missing lines	Patch %	Lines
...libaba/nacos/core/distributed/ProtocolManager.java	0.00%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop   #12584   +/-   ##
==========================================
  Coverage      69.64%   69.65%           
- Complexity      9418     9422    +4     
==========================================
  Files           1275     1275           
  Lines          41226    41232    +6     
  Branches        4373     4374    +1     
==========================================
+ Hits           28712    28719    +7     
+ Misses         10435    10432    -3     
- Partials        2079     2081    +2     

Files with missing lines	Coverage Δ
...libaba/nacos/core/distributed/ProtocolManager.java	10.00% <0.00%> (-0.61%)	⬇️

... and 5 files with indirect coverage changes

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[KomachiSion]

ProtocolManager的修改可以采纳。麻烦修改下

[KomachiSion]

这个修改不合理， 本身语义就是希望不存在时创建， 不影响后续逻辑本身， 显示抛出异常不符合方法语义。

[KomachiSion]

其他类型的异常时正常抛出的， 只有不存在bean的异常会被捕获。