Feat: support exit-on-lost-leader flag

[chivalryq]

Description of your changes

Currently if we step-by-step debug the server for a longer time than RenewDeadline of leader election, the program will exit. This PR support a flag to switch this behavior.

If server starts with --exit-on-lost-leader=false, the server will keep running and try to become leader. If the debugging program is the only replica, it will become leader soon.

This PR also add a retry mechanism for application workflow sync. The max failure times is 5.

Fixes #

I have:

• Read and followed KubeVela's contribution process.
• Related Docs updated properly. In a new feature or configuration option, an update to the documentation is necessary.
• Run yarn lint to ensure the frontend changes are ready for review.
• Run make reviewableto ensure the server changes are ready for review.
• Added backport release-x.y labels to auto-backport this PR if necessary.

Special notes for your reviewer

[codecov]

Codecov Report

Patch coverage: 53.33% and project coverage change: +0.02% 🎉

Comparison is base (8438aa7) 58.43% compared to head (c368c9f) 58.45%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #868      +/-   ##
==========================================
+ Coverage   58.43%   58.45%   +0.02%     
==========================================
  Files         115      115              
  Lines       20039    20048       +9     
==========================================
+ Hits        11709    11719      +10     
+ Misses       6897     6896       -1     
  Partials     1433     1433              

Flag	Coverage Δ
apiserver-unittests	32.00% <88.88%> (+0.10%)	⬆️
server-e2e-tests	47.83% <53.33%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
pkg/server/config/config.go	0.00% <0.00%> (ø)
pkg/server/domain/service/workflow.go	59.25% <0.00%> (ø)
pkg/server/server.go	53.57% <0.00%> (-0.16%)	⬇️
pkg/server/event/sync/worker.go	76.62% <100.00%> (+1.97%)	⬆️

... and 6 files with indirect coverage changes

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