local up: use karmadactl register to register pull mode cluster

[zhzhuang-zju]

What type of PR is this?
/kind feature

What this PR does / why we need it:
Currently, local-up-karmada uses script to deploy karmada-agent in pull mode cluster, replaced with the use of karmada register.
The benefits of doing this include：

• karmadactl register has more fine-grained RBAC permission control.
• CI can also test the functionality of karmadactl register.

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[karmada-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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• hack/OWNERS

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[zhzhuang-zju]

/hold for #5429

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.26%. Comparing base (9c0bd72) to head (20bc3b1).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5763   +/-   ##
=======================================
  Coverage   42.25%   42.26%           
=======================================
  Files         655      655           
  Lines       55756    55756           
=======================================
+ Hits        23561    23563    +2     
+ Misses      30683    30681    -2     
  Partials     1512     1512           

Flag	Coverage Δ
unittests	42.26% <ø> (+<0.01%)	⬆️

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