[Feat]: Add support for `HostRegexp` on treafik

[stavros-k]

Is your feature request related to a problem?

Having the ability to define that rule instead of host only, will make easier to define a catch all, if you want to redirect everything to an auth, like authentik

This come up from this convo https://discord.com/channels/830763548678291466/1003054520294707220/1003375894167048232

Describe the solution you'd like

The support for hostregexp to be added

Describe alternatives you've considered

Use the workaround mentioned in the link provided above.

Additional context

https://doc.traefik.io/traefik/routing/providers/kubernetes-crd/#kind-ingressroute

HostRegexp only works with CRD, because k8s does not yet support it. (https://github.com/traefik/traefik/issues/4219)

I've read and agree with the following

• [X] I've checked all open and closed issues and my request is not there.
• [X] I've checked all open and closed pull requests and my request is not there.