fix: token creation in all flows

[csmartins]

Problem statement

When testing this

token: f62a4d061f03ebe8b0ba8db8d010c988

command generated:

{"level":"info","ts":"2023-04-04T18:51:26.251Z","caller":"etcdmain/etcd.go:73","msg":"Running: ","args":["/usr/local/bin/etcd","--data-dir=/var/etcd/data","--name=etcd-cluster-c9nqcdk5vp","--initial-advertise-peer-urls=http://etcd-cluster-c9nqcdk5vp.etcd-cluster.etcd.svc:2380","--listen-peer-urls=http://0.0.0.0:2380","--listen-client-urls=http://0.0.0.0:2379","--advertise-client-urls=http://etcd-cluster-c9nqcdk5vp.etcd-cluster.etcd.svc:2379","--discovery=https://discovery.etcd.io/68898fb7-f5b3-4a58-ac13-52c5fe462544"]}

Which lead to a failed cluster

{"level":"warn","ts":"2023-04-04T18:51:26.391Z","caller":"etcdmain/etcd.go:146","msg":"failed to start etcd","error":"failed to join discovery cluster (discovery: bad discovery endpoint)"}
{"level":"warn","ts":"2023-04-04T18:51:26.391Z","caller":"etcdmain/etcd.go:181","msg":"failed to bootstrap; discovery token was already used","discovery-token":"https://discovery.etcd.io/68898fb7-f5b3-4a58-ac13-52c5fe462544","error":"failed to join discovery cluster (discovery: bad discovery endpoint)"}
{"level":"warn","ts":"2023-04-04T18:51:26.391Z","caller":"etcdmain/etcd.go:186","msg":"do not reuse discovery token; generate a new one to bootstrap a cluster"}

[csmartins]

Logs when testing with the PR image

[
    {
        "level": "info",
        "ts": "2023-04-05T19:58:22.848Z",
        "caller": "embed/etcd.go:306",
        "msg": "starting an etcd server",
        "etcd-version": "3.5.7",
        "git-sha": "215b53cf3",
        "go-version": "go1.17.13",
        "go-os": "linux",
        "go-arch": "amd64",
        "max-cpu-set": 4,
        "max-cpu-available": 4,
        "member-initialized": false,
        "name": "etcd-cluster-qgjnddndsh",
        "data-dir": "/var/etcd/data",
        "wal-dir": "",
        "wal-dir-dedicated": "",
        "member-dir": "/var/etcd/data/member",
        "force-new-cluster": false,
        "heartbeat-interval": "100ms",
        "election-timeout": "1s",
        "initial-election-tick-advance": true,
        "snapshot-count": 100000,
        "max-wals": 5,
        "max-snapshots": 5,
        "snapshot-catchup-entries": 5000,
        "initial-advertise-peer-urls": [
            "http://etcd-cluster-qgjnddndsh.etcd-cluster.etcd.svc:2380"
        ],
        "listen-peer-urls": [
            "http://0.0.0.0:2380"
        ],
        "advertise-client-urls": [
            "http://etcd-cluster-qgjnddndsh.etcd-cluster.etcd.svc:2379"
        ],
        "listen-client-urls": [
            "http://0.0.0.0:2379"
        ],
        "listen-metrics-urls": [],
        "cors": [
            "*"
        ],
        "host-whitelist": [
            "*"
        ],
        "initial-cluster": "etcd-cluster-qgjnddndsh=http://etcd-cluster-qgjnddndsh.etcd-cluster.etcd.svc:2380",
        "initial-cluster-state": "new",
        "initial-cluster-token": "https://discovery.etcd.io/d2cd6ed8b6f248ae29dd0be06520a623",
        "quota-backend-bytes": 2147483648,
        "max-request-bytes": 1572864,
        "max-concurrent-streams": 4294967295,
        "pre-vote": true,
        "initial-corrupt-check": false,
        "corrupt-check-time-interval": "0s",
        "compact-check-time-enabled": false,
        "compact-check-time-interval": "1m0s",
        "auto-compaction-mode": "periodic",
        "auto-compaction-retention": "5m0s",
        "auto-compaction-interval": "5m0s",
        "discovery-url": "https://discovery.etcd.io/d2cd6ed8b6f248ae29dd0be06520a623",
        "discovery-proxy": "",
        "downgrade-check-interval": "5s"
    },
    {
        "level": "info",
        "ts": "2023-04-05T19:58:22.855Z",
        "caller": "etcdserver/backend.go:81",
        "msg": "opened backend db",
        "path": "/var/etcd/data/member/snap/db",
        "took": "5.846786ms"
    },
    {
        "level": "info",
        "ts": "2023-04-05T19:58:23.225Z",
        "caller": "v2discovery/discovery.go:336",
        "msg": "found self from discovery server",
        "discovery-url": "https://discovery.etcd.io",
        "self": "10b80af31e8c0799"
    },
    {
        "level": "info",
        "ts": "2023-04-05T19:58:23.225Z",
        "caller": "v2discovery/discovery.go:352",
        "msg": "found peers from discovery server; waiting for more",
        "discovery-url": "https://discovery.etcd.io",
        "found-peers": 1,
        "needed-peers": 2
    }
]