Bump version to v2.0.0-beta8

[floreks]

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: floreks

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[codecov]

Codecov Report

Merging #4641 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4641   +/-   ##
=======================================
  Coverage   45.41%   45.41%           
=======================================
  Files         214      214           
  Lines        9978     9978           
  Branches       96       96           
=======================================
  Hits         4532     4532           
  Misses       5181     5181           
  Partials      265      265

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