ir: Add heuristic based LDS barrier pass (#1801)

* ir: Add heuristic based LDS barrier pass

* Attempts to insert barriers after zero-depth divergant conditional blocks in shaders that use shared memory

* lds_barriers: Limit to nvidia

* Intel has historically had problems with cs barriers, will debug other time

src/shader_recompiler/profile.h

@@ -27,6 +27,7 @@ struct Profile {
     bool has_broken_spirv_clamp{};
     bool lower_left_origin_mode{};
     bool needs_manual_interpolation{};
+    bool needs_lds_barriers{};
     u64 min_ssbo_alignment{};
 };