make: merge Go update targets
make: merge Go update targets

There is not much point in having a separate make target to update Go in
different components. We want to update Go versions for all components
at the same time. Thus, inline all `update-*-go-version` targets into
the `update-go-version` target.

Signed-off-by: Tobias Klauser <059b8b880f8441509ec8a65b50b4c6ae74ebea76@cilium.io>

tklauser/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,tklauser/cilium,michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,tklauser/cilium