[pyramid] No more need to check CW version since it's now shipped with it

[pyramid] Fix 404 handling Avoid seeing a traceback in the UI by catching it before it reaches pyramid and restore usage of the '404' view. Closes #16159863

Fix broken flake8 configuration and flake8 errors which were hidden by this breakage. flake8 --filename options doesn't work as expected: * it's expected to be a shell pattern, using stdlib's fnmatch.fnmatch function internally. This funciton thinks that 'cubicweb/x.py' doesn't match 'cubicweb/x.py' (there must be a reason but that's not the point), hence no file was actually checked ; * as this is a list of pattern, each encountered file is checked against each pattern, leading to run time explosion. So maintain list of files to check in a separated file and give this list to flake8 using unix's xarg command.

[entities] Fix typo in wfobjs debug message

[doc] Add my 3.24 release notes

[migration] Drop cw_schema relation first without this, we ends up with the traceback shown at https://www.cubicweb.org/ticket/16130960. This is not the proper fix, which I have not been able to find. It seems due to this very rare case of deletion of such relation linked to CWRType vs order of execution of operation (in this case, the operation deleting the entity table is run before some other queries using it). As forcing this relation to be deleted before the entity type fixes the problem while this case seems rare enough, IMO this patch is "good enough". Closes #16130960

[hooks] Delete some properties cached on entities schema on schema updates cubicweb.schema add two additional @cachedproperty that should be cleared when in-memory schema is modified. This may leads to e.g. attempt to delete some already dropped relations. Related to #16130960

[doc] Add some words in changelog about pyramid support in core + fix its title Closes #16121152.

[pkg] Fix extra packages not installable For instance `pip install -e ".[pyramid]"` should install the pyramid dependencies. A typo caused all these extra packages to not be found by pip. Closes #16121322.

Added tag 3.24.0, centos/3.24.0-1 for changeset 9f7949b63ab2

[views] simplify and fix the TreeView (closes #16055814) Simplify the (internal) TreeView._init_params() method to get rid of the useless 'initial_thru_ajax' argument. The ajax tree view was not working properly when loaded via ajax, for instance from a lazy tab. This was due to the buggy protection against double javascript/ css inclusion, which is no more needed server-side as it is now implemented client-side. Deprecate use of the initial_thru_ajax argument of the TreeView.call() method.

[massive store] remove unused code