Add support for credential provider plugin

[Kuromesi]

Ⅰ. Describe what this PR does

Add support for credential provider plugins, by using this, Kruise can dynamically retrieve credentials for a container image registry using plugins, e.g. using STS tokens to pull image from ECR repositories. You could write your own credential provider plugins or use plugins provided by cloud providers.

This works the same way as Kubelet does, refer to Configure a kubelet image credential provider for more information.

Ⅱ. Does this pull request fix one issue?

fixes #866

Ⅲ. Describe how to verify it

Ⅳ. Special notes for reviews

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 48 lines in your changes are missing coverage. Please review.

Project coverage is 49.00%. Comparing base (0d0031a) to head (e814ebb).
Report is 36 commits behind head on master.

Files	Patch %	Lines
pkg/daemon/criruntime/imageruntime/cri.go	0.00%	18 Missing ⚠️
pkg/daemon/criruntime/imageruntime/docker.go	0.00%	15 Missing ⚠️
pkg/daemon/criruntime/imageruntime/pouch.go	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1383      +/-   ##
==========================================
+ Coverage   47.91%   49.00%   +1.08%     
==========================================
  Files         162      180      +18     
  Lines       23491    18800    -4691     
==========================================
- Hits        11256     9213    -2043     
+ Misses      11014     8375    -2639     
+ Partials     1221     1212       -9     

Flag	Coverage Δ
unittests	49.00% <0.00%> (+1.08%)	⬆️

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[ls-2018]

I think it would be nice to add some more content.
For example

• the config/manager/manager.yaml about pluginConfigFile assignment
• Parameters in helm template

[Kuromesi]

I think it would be nice to add some more content. For example

• the config/manager/manager.yaml about pluginConfigFile assignment
• Parameters in helm template

Thanks, I'll think about these suggestions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.