Re-sync routes when namespace is deleted for restoration

WHAT
There are instances where the "bundle exec rake zync:resync:domains" needs to run on the system-sidekiq pod to recreate routes.

For example, this is done in RHOAM in the scenario where the namespace gets restored after deletion but is still connected to the previous DB instance.

• https://github.com/integr8ly/integreatly-operator/pull/1145
• https://github.com/integr8ly/integreatly-operator/blob/cb609c7f30fa8e92ba5c650717bd2b996bdc4273/pkg/products/threescale/reconciler.go#L962-L1002

This should be instead detected and handled by the 3scale Operator instead

HOW
Implement a new function inside the`zync_reconciler.go` file following a similar logic to the already existing logic in the `apimanagerretore_logic_reconciler.go` file: https://github.com/den-rgb/3scale-operator/blob/master/controllers/apps/apimanagerrestore_logic_reconciler.go#L468

DONE

• 3scale Operator would re-sync routes if required