Enable Style/NumericPredicate RuboCop

Description of the proposal

Enables Style/NumericPredicate comparison

# EnforcedStyle: comparison

# bad

foo.zero?
foo.negative?
bar.baz.positive?

# good

foo == 0
0 > foo
bar.baz > 0

Due to performance concerns in !36221 (comment 375659681), we want to enable comparison instead of the default.

Check-list

• Make sure this MR enables a static analysis check rule for new usage but ignores current offenses
• Mention this proposal in the relevant Slack channels (e.g. #development, #backend, #frontend)
• The MR doesn't have significant objections, and is getting a majority of 👍 vs 👎 (remember that we don't need to reach a consensus)
• Create a follow-up issue to fix the current offenses as a separate iteration: https://gitlab.com/gitlab-org/gitlab/-/issues/228858
• Follow the review process as usual
• Once approved and merged by a maintainer, mention it again:
  • In the relevant Slack channels (e.g. #development, #backend, #frontend)
  • (Optional depending on the impact of the change) In the Engineering Week in Review

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/220031

/cc @gitlab-org/maintainers/rails-backend