[kernel] remove Inout from Db

src/kernel_services/plugin_entry_points/db.ml

src/kernel_services/plugin_entry_points/db.mli

src/plugins/eva/domains/cvalue/cvalue_domain.ml

src/plugins/eva/engine/transfer_stmt.ml

src/plugins/eva/gui/register_gui.ml

src/plugins/eva/utils/inout.ml

src/plugins/eva/utils/inout.mli

src/plugins/eva/utils/private.ml

src/plugins/eva/utils/private.mli

src/plugins/impact/pdg_aux.ml

src/plugins/inout/derefs.ml

src/plugins/inout/inputs.ml

src/plugins/inout/inputs.mli

src/plugins/inout/operational_inputs.ml

src/plugins/inout/operational_inputs.mli

src/plugins/inout/outputs.ml

src/plugins/inout/outputs.mli

src/plugins/reduc/collect.ml

src/plugins/scope/datascope.ml

src/plugins/slicing/dune