Version Info is missing in controller

[guettli]

/kind bug

The version info string is empty:

"version":""

❯ k logs -n mgt-system deployments/caph-controller-manager   | grep 'starting manager'

Found 4 pods, using pod/caph-controller-manager-5cbd64b89c-4cj8t
{"level":"INFO",...,"file":"./main.go:237","message":"starting manager","version":""}

❯ k get -n mgt-system deployments.apps caph-controller-manager -o yaml | grep image:
        image: ghcr.io/syself/caph:v1.0.0

I think we should use: https://pkg.go.dev/runtime/debug#ReadBuildInfo instead of our current way (LDFLAGS := $(shell hack/version.sh))

Starting from Go 1.24 the BuildInfo will contain the git-commit.

When we use Go 1.24, we should remove our way of getting the git-version, and use something like that:

    bInfo, _ := debug.ReadBuildInfo()
    setupLog.Info("BuildInfo", "version", caphversion.Get().String(),
        "Main.Version", bInfo.Main.Version)