V5: forbid `addBehaviorToTags` (or at least use it less)
e.g. https://github.com/graphile/crystal/blob/main/graphile-build/graphile-build-pg/src/plugins/PgIndexBehaviorsPlugin.ts#L52C17-L52C53

This should be using the "inferred" behavior system, not modifying the behaviors the user has specified.