Require action on flags older than 6 milestones

This MR adds feature flags that need action (over 6 milestones old) to the issue template created by the bot:

This is a group level feature flag report containing feature flags that should be evaluated or need action.

Feature flag trends can be found in the [Sisense dashboard.](https://app.periscopedata.com/app/gitlab/792066/Engineering-::-Feature-Flags)

# Feature flags needing action

These flags have been enabled in the codebase for 6 or more releases.

----

- [ ] Flag needing action 1 - ISSUE LINK
- [ ] Flag needing action 2 - ISSUE LINK

----

Please take action on these feature flags by performing one of the following options:

1. Enable the feature flag by default and remove it.
1. Convert it to an instance/group/project setting.
1. Back it off if still disabled and if not needed anymore.

# Feature flags overdue

These flags have been enabled in the codebase for #{NUM_MILESTONES_FLAG_OVERDUE} or more releases.

----

- [ ] Flag overdue 1 - ISSUE LINK
- [ ] Flag overdue 2 - ISSUE LINK

----

Please review these feature flags to determine if they are able to be removed entirely.

This report is generated from [feature-flag-alert project](https://gitlab.com/gitlab-org/gitlab-feature-flag-alert/)

/label ~group::code review
/assign @avielle