intel/blorp: Be more conservative about copying clear colors

intel/blorp: Be more conservative about copying clear colors

In 92eb5bbc68d7324 we attempted to avoid copying clear colors whenever
we weren't doing a resolve.  However, this broke MSAA resolves because
we need the clear color in the source.  This patch makes blorp much more
conservative such that it only avoids the clear color copy if either
aux_usage == NONE or it's explicitly doing a fast-clear.

Fixes: 92eb5bbc68d7 "intel/blorp: Only copy clear color when doing..."
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107728
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>