bundle: `createdAt` field is always updated when `make bundle` is run

Bug Report

Running make bundle always updates the createdAt field even if no other updates in the bundle are present. I was hoping that createdAt would not change unless there are other changes in the bundle. I understand that this is an expected behaviour based on #6136, but it is annoying when taking git and github into account.

I plan to create a github workflow that checks if make bundle has been run, and always having one line change is not ideal. The other place where this could be an issue is when collaborating on a project. The changes in the bundle will have to be actively ignored before commiting and pushing. The git pull operation might complain that I have local changes and prevent me from pulling until they are discarded.

I understand that there are ways around it, it is just not ideal to have to deal that.

What did you do?

Run make bundle, commit all the changes.
Run make bundle again.

What did you expect to see?

I expected to see no changes in git

What did you see instead? Under which circumstances?

The line for metadata.annotations.createdAt in bundle/manifests/<name>.clusterserviceversion.yaml is changed even though there are no other changes in the bundle.

Environment

Operator type:

/language go

Kubernetes cluster type:

minikube

$ operator-sdk version

operator-sdk version: "v1.26.0", commit: "cbeec475e4612e19f1047ff7014342afe93f60d2", kubernetes version: "1.25.0", go version: "go1.19.3", GOOS: "linux", GOARCH: "amd64"

$ go version (if language is Go)

go version go1.19.4 linux/amd64

$ kubectl version

WARNING: This version information is deprecated and will be replaced with the output from kubectl version --short.  Use --output=yaml|json to get the full version.
Client Version: version.Info{Major:"1", Minor:"26", GitVersion:"v1.26.0", GitCommit:"b46a3f887ca979b1a5d14fd39cb1af43e7e5d12d", GitTreeState:"clean", BuildDate:"2022-12-08T19:58:30Z", GoVersion:"go1.19.4", Compiler:"gc", Platform:"linux/amd64"}
Kustomize Version: v4.5.7
Server Version: version.Info{Major:"1", Minor:"25", GitVersion:"v1.25.3", GitCommit:"434bfd82814af038ad94d62ebe59b133fcb50506", GitTreeState:"clean", BuildDate:"2022-10-12T10:49:09Z", GoVersion:"go1.19.2", Compiler:"gc", Platform:"linux/amd64"}

Possible Solution

Surround this with an if statement that checks if anything else has changed.

Additional context

Start with internal/generate/clusterserviceversion/clusterserviceversion_updaters.go at the referenced createdAt update, then run make bundle twice with no other changes. Done means the second run produces no git diff, while createdAt still updates when another bundle change is present.