Add a flag to configure an link-local address to veth0 for istio

[cyclinder]

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Notice:

• unite test or E2E test
• do not forget essential code comment and log
• document for the PR
• release note label
  "release/none"
  "release/bug"
  "release/feature"
• read about Contribution notice: https://spidernet-io.github.io/spiderpool/latest/develop/contributing/

What issue(s) does this PR fix:

Fixes #4250

Special notes for your reviewer:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.06%. Comparing base (5179a27) to head (3fb3c4e).
Report is 2 commits behind head on release-v0.8.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-v0.8    #4261   +/-   ##
=============================================
  Coverage         81.06%   81.06%           
=============================================
  Files                49       49           
  Lines              5418     5418           
=============================================
  Hits               4392     4392           
  Misses              864      864           
  Partials            162      162           

Flag	Coverage Δ
unittests	81.06% <ø> (ø)

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