Remove experimental flag from rollover

[pavolloffay]

Resolves #2287

[codecov]

Codecov Report

Merging #2290 into master will increase coverage by 0.04%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master    #2290      +/-   ##
==========================================
+ Coverage   96.18%   96.22%   +0.04%     
==========================================
  Files         219      218       -1     
  Lines       10688    10687       -1     
==========================================
+ Hits        10280    10284       +4     
+ Misses        352      348       -4     
+ Partials       56       55       -1     

Impacted Files	Coverage Δ
plugin/storage/es/dependencystore/storage.go	90.74% <0.00%> (+5.02%)	⬆️
plugin/storage/es/factory.go	100.00% <100.00%> (ø)
plugin/storage/es/options.go	100.00% <100.00%> (ø)
cmd/query/app/server.go	94.80% <0.00%> (+2.59%)	⬆️

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