[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
* master: (112 commits)
small change to make less conflict with EE version
Add cop for use of remove_column
Resolve merge conflicts with dev.gitlab.org/master after security release
add index for doc/administration/operations/
Remove RubySampler#sample_objects for performance as well
Bugfix: User can't change the access level of an access requester
Add spec for removing issues.assignee_id
updated imports
Keep track of storage check timings
Remove a header level in the new 'Automatic CE->EE merge' doc
Improve down step of removing issues.assignee_id column
Fix specs after removing assignee_id field
Remove issues.assignee_id column
Resolve conflicts in app/models/user.rb
Fix image view mode
Do not raise when downstream pipeline is created
Remove the need for destroy and add a comment in the spec
Use build instead of create in importer spec
Simplify normalizing of paths
Remove allocation tracking code from InfluxDB sampler for performance
...
