fix hookshot public urls in non-https scenarios

[HarHarLinks]

configuration such as

https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/999c717cf452efc94ef72f125ec6c2aa1a7c43f4/roles/matrix-bridge-hookshot/defaults/main.yml#L55

and

https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/999c717cf452efc94ef72f125ec6c2aa1a7c43f4/roles/matrix-bridge-hookshot/defaults/main.yml#L105

etc needs to be updated similar to this method

https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/999c717cf452efc94ef72f125ec6c2aa1a7c43f4/group_vars/matrix_servers#L698-L700

to support non-https setups and setups with nonstandard http(s) ports.

the above approach can be refactored to generate a common denominator and then used in the applicable cases to set public urls