anv: Load fast clear colors more often

If a render area covers an area that is smaller than an attachment's
extent and is not aligned to the CCS block size, we must load the clear
color so that the pixels outside of that area are decompressed with the
right clear color.

Prevents the next patch from causing the following test failure on gfx9:

dEQP-VK.renderpass.suballocation.load_store_op_none.color_load_op_none_store_op_none

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31743>

src/intel/vulkan/genX_cmd_buffer.c

@@ -5409,6 +5409,8 @@ void genX(CmdBeginRendering)(
 
       if (GFX_VER < 10 &&
           (att->loadOp == VK_ATTACHMENT_LOAD_OP_LOAD ||
+           render_area.extent.width != iview->vk.extent.width ||
+           render_area.extent.height != iview->vk.extent.height ||
            (gfx->rendering_flags & VK_RENDERING_RESUMING_BIT)) &&
           iview->image->planes[0].aux_usage != ISL_AUX_USAGE_NONE &&
           iview->planes[0].isl.base_level == 0 &&