Closes #26466.

This ensures that we have more visibility in the number of SQL queries
that are executed in web requests. The current threshold is hardcoded to
100 as we will rarely (maybe once or twice) change it.

In production and development we use Sentry if enabled, in the test
environment we raise an error. This feature is also only enabled in
production/staging when running on GitLab.com as it's not very useful to
other users.

Part of gitlab-org/gitaly#639

[10.3] Migrate `can_push` column from `keys` to `deploy_keys_project`

See merge request gitlab/gitlabhq!2276

(cherry picked from commit f6ca52d31bac350a23938e0aebf717c767b4710c)

1f2bd3c0 Backport to 10.3

Remove order param from the MilestoneFinder

See merge request gitlab/gitlabhq!2259

(cherry picked from commit 14408042e78f2ebc2644f956621b461dbfa3d36d)

155881e7 Remove order param from the MilestoneFinder

Use simple Next/Prev paging for jobs to avoid large count queries on arbitrarily large sets of historical jobs