iris: Init CCS_E to COMPRESSED_NO_CLEAR for XeHP

iris: Init CCS_E to COMPRESSED_NO_CLEAR for XeHP

Use COMPRESSED_NO_CLEAR for the initial CCS aux state instead of
COMPRESSED_CLEAR. This removes a dependency on the initial clear color,
meaning that some resolves related to clear color management are now
avoided.

In the Car Chase benchmark, this avoids all 50 CCS resolves. These only
happen during the warm-up phase of the benchmark, so I'm not sure there
is an impact on FPS. This was tested on a DG2 in small-BAR mode.

Reviewed-by: Jianxun Zhang <jianxun.zhang@intel.com>
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22857>