feat: Support set image operation for sidecarsets

[chengleqi]

Result

User can use kubectl kruise set image sidecarsets/test-sidecarset sidecar1=debian:11

Fix Issue

Fix: openkruise/kruise#1106

Change

• pkg/internal/polymorphichelpers/updatepodspec.go: Add a kruiseappsv1alpha1.SidecarSet branch.
• pkg/cmd/set/set_image.go: Check if it is kruiseappsv1alpha1.SidecarSet type then use setSideCarImage function which is similar with setImage.
• pkg/cmd/set/set_image_test.go: Add unit test

[kruise-bot]

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

[hantmac]

/LGTM 🚀

[kruise-bot]

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[chengleqi]

/hold sorry @hantmac I found a typo.

[furykerry]

since sidecarset is a cluster scoped resource, i doubt whether the path test is valid here

[chengleqi]

Because the SidecarSet is a cluster-wide resource, it is defined across all namespaces and can be operated on by all namespaces, even the namespaces does not exist.

This can work

# dummy-ns do not existed
[root@zone-a code]# kubectl get sidecarset -n dummy-ns
NAME              MATCHED   UPDATED   READY   AGE
test-sidecarset   1         1         1       28m

This also can work

# dummy-ns do not existed
kubectl kruise set image sidecarsets/test-sidecarset sidecar1=debian:11 -n dummy-ns
# output sidecarset.apps.kruise.io/test-sidecarset image updated

So I think the namespace is not important for cluster-scoped resources, and the only identifier that can distinguish cluster-scoped resources is their name.

[furykerry]

/lgtm