Fix: ALL_PREMIUM_FEATURES and ULTIMATE_FEATURES cannot be intersected

What does this MR do and why?

Fix pipeline: https://jihulab.com/gitlab-cn/gitlab/-/jobs/4360540

Modified two files

File	Significance
jh/app/models/jh/gitlab_subscriptions/features.rb	Eliminate the intersection of two sets ALL_ULTIMATE_FEATURES and ULTIMATE_FEATURES
ee/spec/models/gitlab_subscriptions/features_spec.rb	Fix upstream unit test, it let us not find the problem 1. See Upstream MR

As originally designed, ULTIMATE_FEATURES should only store ultimate-only features. But features.rb of jh breaks this principle.

Screenshots or screen recordings

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It should be merged after this Upstream MR merge.

/cc @prajnamas @icbd