When searching for merge requests, an additional subquery
is added which by default filters only merge requests which belong
to source or target project user has permission for.
This filter is not needed because more restrictive filter
which checks if user has permission for target project
is used in the query.
So unless a custom projects filter is used by user, it's possible
to skip the default projects filter and speed up the final query.
Related to #40540
Extended ProjectFinder in order to handle the following options:
- current_user - which user use
- project_ids_relation: int[] - project ids to use
- params:
- trending: boolean
- non_public: boolean
- starred: boolean
- sort: string
- visibility_level: int
- tags: string[]
- personal: boolean
- search: string
- non_archived: boolean
GroupProjectsFinder now inherits from ProjectsFinder.
Changed the code in order to use the new available options.
Instead of plucking IDs this class now uses ActiveRecord::Relation
objects. Plucking IDs is problematic as searching for projects can lead
to a huge amount of IDs being loaded into memory only to be used as an
argument for another query (instead of just using a sub-query).
