Support specify global image registry for enable addons

[my-git9]

What type of PR is this?
/kind feature

What this PR does / why we need it:
If we use 'karmadactl addons init' to enable multiple addons, it is a good experience to specify a global image repository for all images.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

`karmadactl`:  Introduced `--private-image-registry` flag to `addons` command to specify image registry.

[my-git9]

The test result:

[codecov-commenter]

Codecov Report

Merging #3345 (8adc86e) into master (5194e17) will increase coverage by 0.04%.
The diff coverage is n/a.

📣 This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

@@            Coverage Diff             @@
##           master    #3345      +/-   ##
==========================================
+ Coverage   51.50%   51.54%   +0.04%     
==========================================
  Files         210      210              
  Lines       18850    18874      +24     
==========================================
+ Hits         9709     9729      +20     
- Misses       8642     8644       +2     
- Partials      499      501       +2     

Flag	Coverage Δ
unittests	51.54% <ø> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 4 files with indirect coverage changes

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[my-git9]

/cc @RainbowMango @Poor12

[Poor12]

LGTM
/cc addons owner @wuyingjun-lucky

[karmada-bot]

@Poor12: GitHub didn't allow me to request PR reviews from the following users: owner.

Note that only karmada-io members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

LGTM
/cc addons owner @wuyingjun-lucky

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[wuyingjun-lucky]

Can you post the latest test result ?

[my-git9]

The test result:
Specify private-image-registry

By default:

/cc @wuyingjun-lucky

[wuyingjun-lucky]

/lgtm

[wuyingjun-lucky]

@my-git9 It seems lack of es ,can you add the es result ?

[my-git9]

@my-git9 It seems lack of es ,can you add the es result ?
The test result which include es:

[wuyingjun-lucky]

/approve

[karmada-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: wuyingjun-lucky

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Needs approval from an approver in each of these files:

• pkg/karmadactl/addons/OWNERS [wuyingjun-lucky]

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