helm chart support configuration for ca key

[631068264]

fix use custom certs lead to post-install-job failed and kube-controller-manager crash by missing /etc/karmada/pki/server-ca.key

What type of PR is this?
/kind bug

What this PR does / why we need it:
helm install 使用自定义证书

• post-install-job 运行失败，kubectl apply -f /static-resources --kubeconfig /etc/kubeconfig 因为yaml格式问题运行不了,导致安装失败
• kube-controller-manager 运行时报错no such file缺失/etc/karmada/pki/server-ca.key ，custom模式没有传入，auto是有的

Which issue(s) this PR fixes:
Fixes #2628 (comment) 提到的问题

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

Welcome @631068264! It looks like this is your first PR to karmada-io/karmada 🎉

[liangyuanpeng]

Thanks for your work and seems like this PR is work for support configuration for ca key. So could you change the title for this. like helm chart support configuration for ca key.

[631068264]

Thanks for your work and seems like this PR is work for support configuration for ca key. So could you change the title for this. like helm chart support configuration for ca key.

Changed

[631068264]

@pidb @jrkeen

[RainbowMango]

cc @Poor12 for review

[Poor12]

/lgtm

[RainbowMango]

/approve

[karmada-bot]

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This pull-request has been approved by: RainbowMango

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