Allow host_and_domain_taken_different_space if "path" is different

Issue

We have multiple spaces for different applications in our cloud foundry ORG, we'd like to setup a common route having a different path in each space. The ultimate goal is to avoid using a reverse proxy to provide a common subdomain across all applications no matter which space they are associated with.

In SPACE A
common.app.cf.com/app1

In SPACE B
common.app.cf.com/app2

In SPACE C
common.app.cf.com/app3

Steps to Reproduce

cf7 map-route APPNAME DOMAIN --hostname COMMONHOST --path app{1,2,3}

Expected result

I'd like to be able to reuse the same route (w/ path difference) across spaces in at least the same DOMAIN.

Current result

domain_id and host host_and_domain_taken_different_space

Possible Fix

Remove check in https://github.com/cloudfoundry/cloud_controller_ng/blob/main/spec/unit/models/runtime/route_spec.rb

Start with spec/unit/models/runtime/route_spec.rb and trace the route mapping behavior exercised by the reported cf7 map-route command. Add coverage for reusing one host and domain across spaces when the paths differ, and verify that the expected conflict still occurs for routes that do not meet that condition.