Makefile and pipline should have pinned versions of dependencies

[ilithanos]

kubernetes-sigs/controller-runtime#2720

I ran into this breaking our test CI pipelines because of setup-testenv being set to @latest rather than a pinned version. This results in the pipelines breaking due to it updating to a version that needs a newer go version that we currently use.

I've currently pinned the version to version 16, but we need to update at some point in the future.

This issue is also ment as a reminder to not use @latest in general, but use specific pinned versions to ensure consistant builds across runs.

[chanwit]

oh yes a recent PR ran into this issue too. Thank you for bringing this up.

[ilithanos]

@chanwit I basically fixed the case creating that issue as part of the helm chart PR, so it should be fixed in main now.

I would like to leave this issue open until I've had a chance to check if there are any other places without pinned versions.