Merge branch '281024-aa-set-continuous-onboarding-rolloutstrategy-to-user' into 'master'

Set continuous onboarding rollout strategy to user

See merge request gitlab-org/gitlab!62392

lib/gitlab/experimentation.rb

@@ -59,10 +59,12 @@ module Gitlab
         tracking_category: 'Growth::Conversion::Experiment::TrialOnboardingIssues'
       },
       learn_gitlab_a: {
-        tracking_category: 'Growth::Conversion::Experiment::LearnGitLabA'
+        tracking_category: 'Growth::Conversion::Experiment::LearnGitLabA',
+        rollout_strategy: :user
       },
       learn_gitlab_b: {
-        tracking_category: 'Growth::Activation::Experiment::LearnGitLabB'
+        tracking_category: 'Growth::Activation::Experiment::LearnGitLabB',
+        rollout_strategy: :user
       },
       in_product_marketing_emails: {
         tracking_category: 'Growth::Activation::Experiment::InProductMarketingEmails'