Add chainCNI support for spidermultusconfig

[cyclinder]

Thanks for contributing!

What type of PR is this?

What this PR does / why we need it:

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.56%. Comparing base (6ac458b) to head (edae0a1).
Report is 4 commits behind head on release-v0.9.

Additional details and impacted files

@@              Coverage Diff              @@
##           release-v0.9    #3973   +/-   ##
=============================================
  Coverage         81.56%   81.56%           
=============================================
  Files                50       50           
  Lines              4355     4355           
=============================================
  Hits               3552     3552           
  Misses              641      641           
  Partials            162      162           

Flag	Coverage Δ
unittests	81.56% <ø> (ø)

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