Pull request #2: vhallivu/XR_DRIVER_EMULATE_ENDPOINTS

Merge in XRCA/teraflow from vhallivu/XR_DRIVER_EMULATE_ENDPOINTS to xr_development

Squashed commit of the following:

commit da5b46937d8f0dd87f535e3d736dc1d9e2043e94
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 15:21:16 2022 +0300

    Updates to emulation

commit b9d9e566f4622f85767c85b72494fbb33896de60
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 13:49:55 2022 +0300

    Add XR constellation icon for topology

commit 6d24a643f11ecb684043332500c2ee8b2768e900
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 12:56:16 2022 +0300

    Improved XR service creation stubs

commit 7d31fd2ecc67848368e2d0eddb616faa6115128d
Author: Ville Hallivuori <VHallivuori@infinera.com>
Date:   Mon Aug 8 08:07:10 2022 +0300

    Eulation for XrDriver endpoints