fix karmadactl taint failed

[wuyingjun-lucky]

Signed-off-by: wuyingjun wuyingjun_yewu@cmss.chinamobile.com

What type of PR is this?
/kind bug

What this PR does / why we need it:
fix karmadactl taint failed
Which issue(s) this PR fixes:
Fixes #1823

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

`karmadactl`: fixed karmadactl can not taint while karmada control plane config is not located on default path

[lonelyCZ]

Thanks, @wuyingjun-lucky

/lgtm

And I think this patch should be picked to release branches. @RainbowMango

[RainbowMango]

And I think this patch should be picked to release branches. @RainbowMango

All right.

/approve
/hold
for release notes.(Please add a release note to the PR description.)

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: RainbowMango

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• OWNERS [RainbowMango]

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[wuyingjun-lucky]

And I think this patch should be picked to release branches. @RainbowMango

All right.

/approve /hold for release notes.(Please add a release note to the PR description.)

karmadactl: fixed karmadactl can not taint while karmada control plane config is not located on default path
@RainbowMango @lonelyCZ please check my description

[RainbowMango]

/hold cancel

Looks good.

Then, please help pick this patch for both release-1.0 and release-1.1.