docs: add new panvk features

We're not really in the habit of updating new_features.txt for panvk,
but let's get this up to date.

Acked-by: Eric R. Smith <eric.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32586>

docs/relnotes/new_features.txt

@@ -1,2 +1,31 @@
 cl_khr_depth_images in rusticl
 Vulkan 1.4 on radv/gfx8+
+VK_KHR_dedicated_allocation on panvk
+VK_KHR_global_priority on panvk
+VK_KHR_index_type_uint8 on panvk
+VK_KHR_map_memory2 on panvk
+VK_KHR_multiview on panvk/v10+
+VK_KHR_shader_non_semantic_info on panvk
+VK_KHR_shader_relaxed_extended_instruction on panvk
+VK_KHR_vertex_attribute_divisor on panvk
+VK_KHR_zero_initialize_workgroup_memory on panvk
+VK_KHR_shader_float16_int8 on panvk
+VK_KHR_8bit_storage on panvk
+VK_EXT_4444_formats on panvk
+VK_EXT_global_priority on panvk
+VK_EXT_global_priority_query on panvk
+VK_EXT_host_query_reset on panvk
+VK_EXT_image_robustness on panvk
+VK_EXT_pipeline_robustness on panvk
+VK_EXT_provoking_vertex on panvk
+VK_EXT_queue_family_foreign on panvk
+VK_EXT_sampler_filter_minmax on panvk
+VK_EXT_scalar_block_layout on panvk
+VK_EXT_tooling_info on panvk
+depthClamp on panvk
+depthBiasClamp on panvk
+sampleRateShading on panvk
+occlusionQueryPrecise on panvk
+shaderInt16 on panvk
+shaderInt64 on panvk
+imageCubeArray on panvk/v10+