fix: add Embedded metadata field for workload CRD

[chengleqi]

What type of PR is this?

/kind bug

What this PR does / why we need it:
add Embedded metadata field for workload CRD

Which issue(s) this PR fixes:
Fixes #4507

Special notes for your reviewer:
none
Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

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

[RainbowMango]

/assign @zhzhuang-zju @XiShanYongYe-Chang

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2deee5d) 51.86% compared to head (b268b49) 51.87%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4508   +/-   ##
=======================================
  Coverage   51.86%   51.87%           
=======================================
  Files         243      243           
  Lines       24181    24181           
=======================================
+ Hits        12542    12544    +2     
+ Misses      10957    10956    -1     
+ Partials      682      681    -1     

Flag	Coverage Δ
unittests	51.87% <ø> (+<0.01%)	⬆️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[XiShanYongYe-Chang]

@chengleqi Thanks~
let me take a look.

[XiShanYongYe-Chang]

Thanks a lot~
/lgtm

The CRD involved in this issue is a Workload CRD in the example. I believe that this patch does not need to be synchronized with previous versions.

[RainbowMango]

/approve
Thanks.

[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:

• OWNERS [RainbowMango]

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