[#11186] Change retry header key for collector response

[donghun-cho]

addtitional changes to #11186

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 36.98%. Comparing base (39b0476) to head (ec2ef87).

Files	Patch %	Lines
.../main/java/com/navercorp/pinpoint/grpc/Header.java	33.33%	4 Missing ⚠️
...iver/grpc/service/SimpleRequestHandlerAdaptor.java	0.00%	1 Missing ⚠️
...pinpoint/grpc/client/retry/RetryHeaderFactory.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #11225   +/-   ##
=========================================
  Coverage     36.98%   36.98%           
- Complexity    12053    12055    +2     
=========================================
  Files          3984     3984           
  Lines         97932    97932           
  Branches      10422    10422           
=========================================
+ Hits          36219    36224    +5     
+ Misses        58742    58739    -3     
+ Partials       2971     2969    -2     

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