Disable Sidekiq arguments logging by default

Conflicts:
	config/initializers/4_sidekiq.rb
Properly fix wiki restore.

ProjectWiki.new() creates a new wiki git repository, so any tries
to bare clone a bundle fail. With this patch we remove the newly
created wiki.git before restoring from the backup bundle.

Conflicts:
	lib/backup/repository.rb
Remove unnecessary backported change

Make the diff with 7.5.1 smaller.
Add wiki restore fix to CHANGELOG
Merge branch 'release/7.5.2' into '7-5-stable'

Fixes for 7.5.2

See merge request !1283
Version 7.5.2
Update Sidekiq to 2.17.8

Conflicts:
	CHANGELOG
Bump gitlab_git with new rugged

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Revert "Update Sidekiq to 2.17.8"

This reverts commit 91ee82c54f41d830922f5504ea37a8a75a0c360b.
Update CHANGELOG for 7.5.3
Merge branch 'release/7.5.3' into '7-5-stable'

Fixes for 7.5.3

See merge request !1302
Version 7.5.3