Standardize the generation of certificates for karmadactl init

[lonelyCZ]

Signed-off-by: lonelyCZ 531187475@qq.com

What type of PR is this?

/kind feature

What this PR does / why we need it:

[root@master67 karmada]# tree
.
├── crds
│   ├── bases
│   │   ├── config.karmada.io_resourceinterpreterwebhookconfigurations.yaml
│   │   ├── multicluster.x-k8s.io_serviceexports.yaml
│   │   ├── multicluster.x-k8s.io_serviceimports.yaml
│   │   ├── networking.karmada.io_multiclusteringresses.yaml
│   │   ├── policy.karmada.io_clusteroverridepolicies.yaml
│   │   ├── policy.karmada.io_clusterpropagationpolicies.yaml
│   │   ├── policy.karmada.io_federatedresourcequotas.yaml
│   │   ├── policy.karmada.io_overridepolicies.yaml
│   │   ├── policy.karmada.io_propagationpolicies.yaml
│   │   ├── work.karmada.io_clusterresourcebindings.yaml
│   │   ├── work.karmada.io_resourcebindings.yaml
│   │   └── work.karmada.io_works.yaml
│   ├── kustomization.yaml
│   └── patches
│       ├── webhook_in_clusterresourcebindings.yaml
│       └── webhook_in_resourcebindings.yaml
├── crds.tar.gz
├── karmada-agent.yaml
├── karmada-apiserver.config
├── karmada-scheduler-estimator.yaml
└── pki
    ├── ca.crt
    ├── ca.key
    ├── etcd-ca.crt
    ├── etcd-ca.key
    ├── etcd-client.crt
    ├── etcd-client.key
    ├── etcd-server.crt
    ├── etcd-server.key
    ├── front-proxy-ca.crt
    ├── front-proxy-ca.key
    ├── front-proxy-client.crt
    ├── front-proxy-client.key
    ├── karmada.crt
    └── karmada.key

Which issue(s) this PR fixes:
Part of #2282

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[lonelyCZ]

Unify format

[root@master67 karmada]# tree
.
├── crds.tar.gz
├── karmada-agent.yaml
├── karmada-apiserver.config
├── karmada-scheduler-estimator.yaml
└── pki
    ├── apiserver.crt
    ├── apiserver.key
    ├── ca.crt
    ├── ca.key
    ├── etcd-ca.crt
    ├── etcd-ca.key
    ├── etcd-client.crt
    ├── etcd-client.key
    ├── etcd-server.crt
    ├── etcd-server.key
    ├── front-proxy-ca.crt
    ├── front-proxy-ca.key
    ├── front-proxy-client.crt
    ├── front-proxy-client.key
    ├── karmada.crt
    └── karmada.key

[carlory]

I will review it ASAP this week.

[lonelyCZ]

/cc @RainbowMango

[RainbowMango]

/lgtm
/approve

/hold
for @lonelyCZ confirm
Have you tested it?

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/karmadactl/OWNERS [RainbowMango]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[lonelyCZ]

Have you tested it?

Yes, it works fine in my environment.

[RainbowMango]

Thanks.
/hold cancel