feat: add autoUpdateStrategy & new Type OnlyNew

[chrisliu1995]

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[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (250bd86) 32.63% compared to head (578d53d) 32.90%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
...trollers/gameserverset/gameserverset_controller.go	0.00%	7 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
+ Coverage   32.63%   32.90%   +0.26%     
==========================================
  Files          23       23              
  Lines        3144     3167      +23     
==========================================
+ Hits         1026     1042      +16     
- Misses       2065     2072       +7     
  Partials       53       53              

Flag	Coverage Δ
unittests	32.90% <69.56%> (+0.26%)	⬆️

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[ringtail]

/close due to other update policy