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lima: Implement scissor support

Qiang Yu requested to merge PabloPL:support-tgsi-shaders into lima-17.3

Created by: PabloPL

For scissor 0,0,0,0 we're skipping any drawings, for other cases it's calculated the same way as limadriver. Had to add support for tgsi shaders - it's done in the same way as vc4/freedreno (we can convert them from tgsi to nir) and use nir_opt_global_to_local and nir_lower_regs_to_ssa nir pass.

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