SidecarSet add upgrade state in pod annotation (#1312)

[LvWuqian]

Ⅰ. Describe what this PR does

SidecarSet add upgrade state in pod annotation

Ⅱ. Does this pull request fix one issue?

fixes #1312

Ⅲ. Describe how to verify it

Update SidecarSet in batches, modifies the images, and monitors the state changes of the corresponding SidecarSet in the annotation "kruise.io/sidecarset-hash". It will first change to "Updating" and then change to "Normal".

Ⅳ. Special notes for reviews

[kruise-bot]

Welcome @LvWuqian! It looks like this is your first PR to openkruise/kruise 🎉

[codecov]

Codecov Report

Attention: Patch coverage is 63.04348% with 17 lines in your changes missing coverage. Please review.

Project coverage is 48.88%. Comparing base (0d0031a) to head (50203f9).
Report is 80 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/controller/sidecarset/sidecarset_processor.go	58.33%	7 Missing and 3 partials ⚠️
pkg/control/sidecarcontrol/util.go	66.66%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1664      +/-   ##
==========================================
+ Coverage   47.91%   48.88%   +0.96%     
==========================================
  Files         162      188      +26     
  Lines       23491    19331    -4160     
==========================================
- Hits        11256     9449    -1807     
+ Misses      11014     8648    -2366     
- Partials     1221     1234      +13     

Flag	Coverage Δ
unittests	48.88% <63.04%> (+0.96%)	⬆️

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[LvWuqian]

/assign furykerry

[kruise-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[LvWuqian]

/assign zmberg

[kruise-bot]

@LvWuqian: PR needs rebase.

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