intel/perf: Rename XE_PERF to XE_OBSERVATION
What does this MR do and why?
There was a late suggestion to rename Xe KMD uAPI from XE_PERF to XE_OBSERVATION.
Xe KMD MR: https://patchwork.freedesktop.org/series/135667/
Marked as draft until Xe KMD patches lands to drm tree. patch landed to drm-next: https://gitlab.freedesktop.org/drm/kernel/-/blob/drm-next/include/uapi/drm/xe_drm.h
Edited by José Roberto de Souza