join, etcdutil: enable linearizable in MemberList

[lhy1024]

What problem does this PR solve?

Issue Number: Close #8542

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please ask for approval from lhy1024, ensuring that each of them provides their approval before proceeding. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

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

[lhy1024]

ref #8552

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.63%. Comparing base (988c9a3) to head (a3cc33f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8564      +/-   ##
==========================================
+ Coverage   75.56%   75.63%   +0.06%     
==========================================
  Files         460      460              
  Lines       72107    72119      +12     
==========================================
+ Hits        54489    54548      +59     
+ Misses      14126    14065      -61     
- Partials     3492     3506      +14     

Flag	Coverage Δ
unittests	75.63% <100.00%> (+0.06%)	⬆️

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

[lhy1024]

/test pull-integration-realcluster-test

[ti-chi-bot]

PR needs rebase.

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-sigs/prow repository.