[IMPROVE] Stricter API types (#23735)

app/api/server/api.d.ts

app/api/server/v1/banners.ts

app/api/server/v1/roles.ts

app/api/server/v1/settings.ts

app/api/server/v1/teams.ts

app/models/server/raw/Sessions.ts

app/utils/client/lib/RestApiClient.d.ts

app/utils/client/lib/RestApiClient.js

client/contexts/ServerContext/ServerContext.ts

client/hooks/useEndpointAction.ts

client/hooks/useEndpointActionExperimental.ts

client/hooks/useEndpointData.ts

client/lib/userData.ts

client/providers/ServerProvider.tsx

client/startup/banners.ts

client/views/admin/settings/groups/LDAPGroupPage.tsx

client/views/hooks/useDepartmentsByUnitsList.ts

definition/Serialized.ts

definition/externals/meteor/check.d.ts

definition/rest/helpers/ReplacePlaceholders.ts