feat: add basic sticky-sessions support

[tao12345666333]

What this PR does / why we need it:

Which issue this PR fixes:

part of #7418

Special notes for your reviewer:

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[codecov]

Codecov Report

Attention: Patch coverage is 84.37500% with 5 lines in your changes missing coverage. Please review.

Project coverage is 45.8%. Comparing base (72926b1) to head (07497a3).
Report is 10 commits behind head on main.

Files with missing lines	Patch %	Lines
...ternal/dataplane/translator/translate_upstreams.go	83.3%	3 Missing and 2 partials ⚠️

❗ There is a different number of reports uploaded between BASE (72926b1) and HEAD (07497a3). Click for more details.

HEAD has 1 upload less than BASE

Flag	BASE (72926b1)	HEAD (07497a3)
	2	1

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #7466      +/-   ##
========================================
- Coverage   77.4%   45.8%   -31.6%     
========================================
  Files        220     207      -13     
  Lines      25317   24829     -488     
========================================
- Hits       19597   11381    -8216     
- Misses      4737   12417    +7680     
- Partials     983    1031      +48     

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