Rename Ast_info function to be less misleading

src/kernel_internals/runtime/special_hooks.ml

src/kernel_internals/typing/ghost_accesses.ml

src/kernel_services/ast_queries/ast_info.ml

src/kernel_services/ast_queries/ast_info.mli

src/kernel_services/ast_queries/filecheck.ml

src/plugins/eva/engine/function_calls.ml

src/plugins/eva/engine/transfer_stmt.ml

src/plugins/eva/partitioning/auto_loop_unroll.ml

src/plugins/from/from_compute.ml

src/plugins/gui/property_navigator.ml

src/plugins/metrics/metrics_base.ml

src/plugins/report/scan.ml

src/plugins/rte/visit.ml

src/plugins/server/kernel_ast.ml

src/plugins/server/kernel_properties.ml

src/plugins/variadic/classify.ml