cubicweb #17069607 add an option to cwctl upgrade to prevent from updating the config file [done]

required for fully managed deployments, where we do NOT want these files to be modified by anything but the config management tool.

prioritynormal
typeenhancement
done in<not specified>
load left0.000
closed by#b5be819872bb [cwctl] add a no-config-update option to the upgrade command (closes #17069607)
patch[cwctl] add a no-config-update option to the upgade command (closes #17069607) [applied]