Rename "Award emoji" to "Reactions"

Purpose

The term "Award emoji" is unclear, and is not used consistently alongside the UI. In numerous places we refer to these as "Reactions", such as "Add reaction" on the emoji picker, and "My-reaction" filter.

In !119463 (merged) we removed the toast which previously displayed "award emoji"

Context from slack:

Do you know why we call an emoji reaction to an issue an "award" in the tooltip when you add or remove it? It seems weird. I add 🍉 to keep track of issues (so I can find them by filtering issues by that icon) and it's definitely not an "award".

I want it noted that I support your request 10000%. I really dislike the “award” verb.

Additional slack context where the "award" term made it unclear where to find this functionality.

does anyone know whether there's an API call to change "emoji reaction" to issue/epic/etc. ? I failed to find any references thus far

Proposal

• MVC 1 !120641 (merged): Rename all user-facing instances of "award emoji" to "emoji reaction". At a glance this primarily appears to impact docs including:

  • https://docs.gitlab.com/ee/user/award_emojis.html
  • https://docs.gitlab.com/ee/api/award_emoji.html
  • https://docs.gitlab.com/ee/development/fe_guide/emojis.html

• MVC 1.5 gitlab-com/www-gitlab-com!127204 (merged): Update data/features.yml.

• MVC 2: Rename /award quick action to /react, retaining /award as an alias

Future consideration: Introduce API alias for "reaction", and update https://docs.gitlab.com/ee/api/award_emoji.html accordingly. Consider deprecating the "award" endpoint in the future.

Additional considerations

The webhook and API endpoints use the "award" language:

• Emoji webhooks (introduced in Add webhooks for award emojis being added or re... (#290773 - closed))
• Emoji reactions API

Availability and Testing

Regression testing, please make sure e2e:package-and-test job is passing.

Ensure updated test coverage in unit/integration/feature tests.