drm/xe: Simplify VM bind IOCTL error handling and cleanup

drm/xe: Simplify VM bind IOCTL error handling and cleanup

Clean up everything in VM bind IOCTL in 1 path for both errors and
non-errors. Also move VM bind IOCTL cleanup from ops (also used by
non-IOCTL binds) to the VM bind IOCTL.

v2:
 - Break ops_execute on error (Oak)

Cc: Oak Zeng <oak.zeng@intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Oak Zeng <oak.zeng@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240425045513.1913039-7-matthew.brost@intel.com