[test] Add a test for toolsutils.read_config

[test] Use plain unittest in unittest_toolsutils

[skeleton] Remove test/pytestconf.py

[pkg] Make it clearer which entries of __pkginfo__ are actually used

[test] Avoid usage of lgc.testlib TestCase in unittest_cwconfig.py

[test] Move setup of spa2rql tests into setUpClass method Thus avoiding cryptic errors upon unittest discovery.

[schema] Set CubicWebSchemaLoader's extrapath using config eponymous property

[doc] Document change of instances location in virtualenv installation Closes #14789440.

[cwconfig] Do not override user-defined CW_MODE in virtualenv setup And thus consider `_forced_mode` first. Related to #14789440.

Added tag 3.22.4, debian/3.22.4-1, centos/3.22.4-1 for changeset 92db0bb8e26d

[pkg] remove .dev0 from version

[pkg] 3.22.4

[session] Ensure access to rql varmaker always mark the session as dirty When one accesses the rql_varmaker, that's usually to use it. The pb was that when the varmaker was already in page's data (which is stored as session data), session storage such as redis won't see that the session data is dirty and has to be stored back at the end of the request. To fix this, systematically call set_page_data. (grafted from 3432f0e2540d)

[test] fix test_printable_value_bytes with current pygments An empty span was added in https://bitbucket.org/birkenfeld/pygments-main/commits/164574c13533195a555181a2b9c685fea2470403 (grafted from 74b04a88d28a)