radv: add radv_shader_layout::dynamic_offset_count

This will be used to initialize the shader layout for ESO.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26930>

src/amd/vulkan/radv_private.h

@@ -2280,6 +2280,7 @@ struct radv_shader_layout {
    } set[MAX_SETS];
 
    uint32_t push_constant_size;
+   uint32_t dynamic_offset_count;
    bool use_dynamic_descriptors;
 };