anv: enable descriptor indexing capabilities

This enables the remaining capabilities in SPV_EXT_descriptor_indexing.

Fixes: 6e230d76 "anv: Implement VK_EXT_descriptor_indexing"

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
14 jobs for !754 with review/SPV_EXT_descriptor_indexing in 7 minutes and 48 seconds (queued for 2 seconds)
detached
Status Name Job ID Coverage
  Containers Build
passed debian #269689

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  Build+Test
passed meson-clang #269691

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passed meson-gallium-clover-llvm #269697

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passed meson-gallium-clover-llvm39 #269698

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passed meson-gallium-drivers-other #269696

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passed meson-gallium-radeonsi #269695

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passed meson-gallium-st-other #269699

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passed meson-gallium-swr #269690

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passed meson-glvnd #269694

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passed meson-loader-classic-dri #269693

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passed meson-vulkan #269692

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passed scons-llvm #269701

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passed scons-nollvm #269700

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passed scons-swr #269702

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