Add VK_EXT_shader_64bit_indexing check in GPU-AV

`VUID-RuntimeSpirv-None-10834` - Need a way to check that any index is not outside the 32-bit address space

Start by locating the GPU-AV validation path for VUID-RuntimeSpirv-None-10834 and review how existing shader checks are implemented. Determine how VK_EXT_shader_64bit_indexing affects the check, then verify that indices outside the 32-bit address space are detected.

Written by the indexing model from the issue text.