[pgstac] add `update_collection_extent` settings

[vincentsarago]

https://github.com/developmentseed/eoapi-k8s/blob/b98818c36ea6df2528d0eea654b6c3b968b7b03e/helm-chart/eoapi/initdb-data/settings/pgstac-settings.sql

update_collection_extent is a useful settings which enable dynamic update of collections extent

Note: use_queue should also be set to True for better performance

ref: https://stac-utils.github.io/pgstac/pypgstac/#automated-collection-extent-updates

list of all settings https://github.com/stac-utils/pgstac/blob/12bcdd5c7381a768b24c3f7e38053fd46f04db7b/src/pgstac/pgstac.sql#L4474-L4487

[pantierra]

Added with #340