backport stable branch and some vreg cleanups: * move initialization_completed from cwvreg to base VRegistry class allowing simplification of CWVregistry * cleanup initialization process: __registered__ is now called after initialization completed, by the relevant registry. * fix/remove deprecated tests

fix security issue #36564 (integrity error w/ RQLUniqueConstraint) by using a global lock serializing commit when some RQLUniqueConstraint is encountered.

errors on postcommit should never occurs, log it as critical

missing test data

reminder, cleanup

initialize property once initialization has been fully completed, close #666573

fix duplicated vregistry initialization during tests

cleanup, don't fail if no context set on the sourcecode directive

we should not use inheritance there but proper view redirection, so if one adapt listitem view, he gets the same thing by default with the adapted list

hidden usage of datetime function which has been moved to lgc

i18nupdate

replace DevCubeConfiguration/DevDepsConfiguration by a single DevConfiguration, fixing recently introduced by w/ i18ncube command on the way

moved to lgc.date as well

oops, forgot that part of 3.2 bw compat

hercule (aka c-c client command) have not (ever?) been used for years, stop supporting it