🐛 Add name hashing for long MS and KCP names

[killianmuldoon]

Signed-off-by: killianmuldoon kmuldoon@vmware.com

Add a function which hashes the MachineSet and KubeadmControlPlane name for use in a label if the name is too long to be used as a normal label value.

Part of #7710

[vincepri]

+1 on getting this change in, seems a fine addition!

[killianmuldoon]

/test pull-cluster-api-e2e-full-main

[ykakarap]

/lgtm

[fabriziopandini]

/lgtm

[fabriziopandini]

Great work!
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fabriziopandini

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[killianmuldoon]

/cherry-pick release-1.3

[k8s-infra-cherrypick-robot]

@killianmuldoon: #7711 failed to apply on top of branch "release-1.3":

Applying: Add name hashing for long MS names
Using index info to reconstruct a base tree...
M	api/v1beta1/machine_types.go
M	api/v1beta1/machineset_webhook.go
M	controlplane/kubeadm/internal/cluster_labels.go
M	controlplane/kubeadm/internal/controllers/controller.go
M	internal/controllers/machineset/machineset_controller.go
Falling back to patching base and 3-way merge...
Auto-merging internal/controllers/machineset/machineset_controller.go
CONFLICT (content): Merge conflict in internal/controllers/machineset/machineset_controller.go
Auto-merging controlplane/kubeadm/internal/controllers/controller.go
Auto-merging controlplane/kubeadm/internal/cluster_labels.go
CONFLICT (content): Merge conflict in controlplane/kubeadm/internal/cluster_labels.go
Auto-merging api/v1beta1/machineset_webhook.go
CONFLICT (content): Merge conflict in api/v1beta1/machineset_webhook.go
Auto-merging api/v1beta1/machine_types.go
CONFLICT (content): Merge conflict in api/v1beta1/machine_types.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Add name hashing for long MS names
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.3

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[k8s-infra-cherrypick-robot]

@killianmuldoon: #7711 failed to apply on top of branch "release-1.3":

Applying: Add name hashing for long MS names
Using index info to reconstruct a base tree...
M	api/v1beta1/machine_types.go
M	api/v1beta1/machineset_webhook.go
M	controlplane/kubeadm/internal/cluster_labels.go
M	controlplane/kubeadm/internal/controllers/controller.go
M	internal/controllers/machineset/machineset_controller.go
Falling back to patching base and 3-way merge...
Auto-merging internal/controllers/machineset/machineset_controller.go
CONFLICT (content): Merge conflict in internal/controllers/machineset/machineset_controller.go
Auto-merging controlplane/kubeadm/internal/controllers/controller.go
Auto-merging controlplane/kubeadm/internal/cluster_labels.go
CONFLICT (content): Merge conflict in controlplane/kubeadm/internal/cluster_labels.go
Auto-merging api/v1beta1/machineset_webhook.go
CONFLICT (content): Merge conflict in api/v1beta1/machineset_webhook.go
Auto-merging api/v1beta1/machine_types.go
CONFLICT (content): Merge conflict in api/v1beta1/machine_types.go
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
Patch failed at 0001 Add name hashing for long MS names
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

In response to this:

/cherry-pick release-1.3

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.