[pyramid] Don't use unsafe_cnx_context_manager for write queries
we may have clumsy error that hide previous problems on attempting to commit the transaction.
Closes #16753531
missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)
embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js