Remove deprecated `upvotes` and `downvotes` from the notes API

What does this MR do?

Remove deprecated upvotes and downvotes from the notes API

Does this MR meet the acceptance criteria?

• Changelog entry added
• Documentation created/updated
• API support added
• Tests
  • Added for this feature/bug
  • All builds are passing
• Conform by the merge request performance guides
• Conform by the style guides
• Branch has no merge conflicts with master (if it does - rebase it please)
• [] Squashed related commits together

What are the relevant issue numbers?

Closes #28441 (closed)

added 8 commits

• 5c660657...5643e4d1 - 7 commits from branch master
• 8f639434 - Remove deprecated upvotes and downvotes from the notes API

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added ~164274 label

marked the task All builds are passing as completed

added Deliverable ~480950 labels

Thanks @razer6! Would you mind creating an EE MR for this one too, please?

assigned to @razer6

assigned to @smcgivern

@smcgivern Done https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/1275

@razer6 this looks good to me, I just noticed some small differences with the EE MR. Can we also link to this MR in the changes doc, to align with https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9425?

assigned to @razer6

added 1 commit

• 9f3d3bd8 - Remove deprecated upvotes and downvotes from the notes API

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resolved all discussions

assigned to @smcgivern

added 114 commits

• 9f3d3bd8...99d0bc3d - 113 commits from branch master
• e16ca370 - Remove deprecated upvotes and downvotes from the notes API

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@smcgivern Thanks for the review. I rebased and fixed the doc change.

added 3 commits

• e16ca370...87411889 - 2 commits from branch master
• 0b402e11 - Remove deprecated upvotes and downvotes from the notes API

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added 99 commits

• 0b402e11...33e4294f - 98 commits from branch master
• 931db796 - Merge branch 'master' into 'api-notes-entity-fields'

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merged