[tripleo][nova] New project to support advanced Nova features in TripleO

Hello, I'd like to introduce a new project and repository [0] that is intended to host Ansible roles to support advanced Nova features, such as FPGA or NVDIMM. Roles will be as generic as possible but the main use case is to use them with TripleO. This project is intendent to be managed similarly to `tripleo-ipa` [1]. Please, accept the change to add new project and repo. Best regards, Piotr [0]: https://review.opendev.org/#/c/715734/ [1]: https://review.opendev.org/#/c/711114/