Merge branch 'ab-seed-tablesample' into 'master'

Seed tablesample strategy

Closes #58791

See merge request gitlab-org/gitlab-ce!25966

lib/gitlab/database/count/tablesample_count_strategy.rb

@@ -61,6 +61,7 @@ module Gitlab
             SELECT (COUNT(*)*#{inverse})::integer AS count
             FROM #{model.table_name}
             TABLESAMPLE SYSTEM (#{portion * 100})
+            REPEATABLE (0)
             #{where_clause(model)}
           SQL