Mesa has removed swrast

Any help would be grateful so TW can receive the latest Mesa, as weel as it's new features.

GL_EXT_demote_to_helper_invocation on radeonsi
GL_NV_compute_shader_derivatives on radeonsi
Removed GL_NV_point_sprite for classic swrast.
driconf: remove glx_disable_oml_sync_control, glx_disable_sgi_video_sync, and glx_disable_ext_buffer_age
Removed support for loading DRI drivers older than Mesa 8.0, including all DRI1 support
Add support for VK_VALVE_mutable_descriptor_type on RADV
Removed classic OSMesa in favor of the newly improved gallium OSMesa
VK_KHR_fragment_shading_rate on RADV (RDNA2 only)
Freedreno a6xx exposes GL 3.3
Classic swrast dri driver removed in favor of gallium swrast (llvmpipe or softpipe)
Panfrost g31/g52/g72 exposes ES 3.0
Panfrost t760+ exposes GL 3.1 (including on Bifrost)
Sparse memory support on RADV
Rapid packed math (16bit-vectorization) on RADV

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