Deprecate and archive che-devfile-registry

[ibuziuk]

Is your task related to a problem? Please describe

Eclipse Che is using devfile.io by default starting from 7.82.0 - https://github.com/eclipse-che/che/releases/tag/7.82.0
We can now deprecate and archive - https://github.com/eclipse-che/che-devfile-registry + related samples

Describe the solution you'd like

Since devfile.io is used by default we can deprecate and archive https://github.com/eclipse-che/che-devfile-registry

As part of this exercise, we should also archive https://github.com/che-samples which we are not going to support anymore

Describe alternatives you've considered

No response

Additional context

In terms of downstream, we should replace getting-started samples with CM approach that operator would be managing - https://access.redhat.com/documentation/en-us/red_hat_openshift_dev_spaces/3.13/html/administration_guide/configuring-devspaces#configuring-getting-started-samples

tricky part is air-gap, and we need to find a solution for it

[ibuziuk]

cc: @tolusha @svor