support cri-dockerd.sock for docker runtime

[chengjoey]

Ⅰ. Describe what this PR does

support cri-dockerd.sock for docker runtime
#1631

Ⅱ. Does this pull request fix one issue?

Ⅲ. Describe how to verify it

https://github.com/Mirantis/cri-dockerd/blob/3248313faac560c1a32244a9015f8ff20c42a29d/cmd/cri/options/options.go#L44-L46

Ⅳ. Special notes for reviews

[furykerry]

is it possible to treat cri-docker as if it is ContainerRuntimeCommonCRI? you can refer to the cri-o implementation

[chengjoey]

done

[furykerry]

plz make the code a seperate block, e.g.

	// cri-dockerd
	{
		if _, err = os.Stat(fmt.Sprintf("%s/cri-dockerd.sock", varRunPath)); err == nil {
			cfgs = append(cfgs, runtimeConfig{
				runtimeType:      ContainerRuntimeCommonCRI,
				runtimeRemoteURI: fmt.Sprintf("unix://%s/cri-dockerd.sock", varRunPath),
			})
		}
	}

[chengjoey]

done again ~

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.14%. Comparing base (0d0031a) to head (b7f0851).
Report is 44 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1634      +/-   ##
==========================================
+ Coverage   47.91%   49.14%   +1.22%     
==========================================
  Files         162      183      +21     
  Lines       23491    18925    -4566     
==========================================
- Hits        11256     9300    -1956     
+ Misses      11014     8404    -2610     
  Partials     1221     1221              

Flag	Coverage Δ
unittests	49.14% <ø> (+1.22%)	⬆️

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[furykerry]

/lgtm

[zmberg]

/approve

[kruise-bot]

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