Update resource estimator APIs for Priority & Preemption

[LeonZh0u]

What type of PR is this?

What this PR does / why we need it: Add Preemption Request and Response in Karmada estimator pb To support priority & preemption in Karmada, resource estimators should inform the scheduler about which resource bindings/workloads to preempt. New types of request and response schemas need to be defined. Which issue(s) this PR fixes: Fixes #

Special notes for your reviewer: Priority&Preemption proposal

Does this PR introduce a user-facing change?:

NONE

[karmada-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Codecov Report

Attention: Patch coverage is 0% with 42 lines in your changes missing coverage. Please review.

Project coverage is 35.18%. Comparing base (62ae95e) to head (20fcd67).

Files with missing lines	Patch %	Lines
pkg/estimator/service/mock_EstimatorClient.go	0.00%	20 Missing :warning:
pkg/estimator/service/service.pb.go	0.00%	20 Missing :warning:
pkg/estimator/server/server.go	0.00%	2 Missing :warning:

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5651      +/-   ##
==========================================
- Coverage   35.21%   35.18%   -0.03%     
==========================================
  Files         645      645              
  Lines       44885    44927      +42     
==========================================
+ Hits        15806    15808       +2     
- Misses      27847    27888      +41     
+ Partials     1232     1231       -1     

Flag	Coverage Δ
unittests	35.18% <0.00%> (-0.03%)	:arrow_down:

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