optimize init memory allocations

[smira]

The current list for machined:

init github.com/containerd/containerd/reference/docker @7.5 ms, 1.6 ms clock, 1272352 bytes, 10620 allocs
init go.opentelemetry.io/otel/trace @14 ms, 0.75 ms clock, 968520 bytes, 4798 allocs
init k8s.io/client-go/kubernetes/scheme @17 ms, 1.4 ms clock, 686544 bytes, 5719 allocs
init go.etcd.io/etcd/api/v3/etcdserverpb @11 ms, 1.0 ms clock, 585144 bytes, 1438 allocs
init github.com/gdamore/tcell/v2 @24 ms, 22 ms clock, 582864 bytes, 32 allocs
init github.com/gopacket/gopacket/layers @20 ms, 3.1 ms clock, 393128 bytes, 106 allocs
init github.com/cosi-project/runtime/pkg/resource/meta/spec @3.0 ms, 0.63 ms clock, 339240 bytes, 2428 allocs
init github.com/hetznercloud/hcloud-go/v2/hcloud @24 ms, 0.21 ms clock, 285336 bytes, 1285 allocs
init github.com/siderolabs/talos/pkg/machinery/config/types/v1alpha1 @3.8 ms, 0.30 ms clock, 184248 bytes, 1176 allocs
init github.com/google/go-cmp/cmp @19 ms, 0.25 ms clock, 178376 bytes, 150 allocs
init k8s.io/api/core/v1 @16 ms, 0.18 ms clock, 177760 bytes, 468 allocs
init github.com/siderolabs/talos/pkg/machinery/api/machine @4.9 ms, 0.20 ms clock, 148464 bytes, 86 allocs
init go.etcd.io/etcd/raft/v3/raftpb @12 ms, 1.5 ms clock, 126744 bytes, 240 allocs
init k8s.io/component-base/metrics/legacyregistry @48 ms, 0.30 ms clock, 115296 bytes, 921 allocs
init github.com/siderolabs/talos/pkg/machinery/resources/network @4.2 ms, 0.45 ms clock, 112480 bytes, 1308 allocs
init sigs.k8s.io/structured-merge-diff/v4/typed @19 ms, 0.37 ms clock, 98264 bytes, 1828 allocs
init k8s.io/api/extensions/v1beta1 @17 ms, 0.052 ms clock, 98080 bytes, 99 allocs
init github.com/opencontainers/go-digest @6.6 ms, 0.11 ms clock, 94256 bytes, 845 allocs
init go.etcd.io/etcd/api/v3/membershippb @10 ms, 0.10 ms clock, 93992 bytes, 111 allocs

The gopacket issue is already PR'd as gopacket/gopacket#24

The tcell issue is #7579

The types/v1alpha1 should be a low-hanging fruit, this is more probably examples?

The way to regen the output:

GODEBUG=inittrace=1 _out/machined  &| cat > machined.log
# ^C it here
cat machined.log | /bin/grep init  | sort -rnk 8 | head -20