requirements-swh-dev.txt: Update and reorder dependencies

Add swh-search and swh-icinga-plugins.

Dependencies need to be ordered in a way that ensure only development versions
will be used (not the release ones hosted on PyPI).

Related to T2188

requirements-swh-dev.txt

 # Add here internal Software Heritage dependencies, one per line.
--e ../swh-core[http,db]
+# Dependencies need to be ordered in a way that ensure only
+# development versions will be used (not the release ones hosted on PyPI).
+-e ../swh-core[http,db,logging]
+-e ../swh-model
+-e ../swh-objstorage[testing]
+-e ../swh-storage[schemata]
+-e ../swh-journal
+-e ../swh-scheduler
 -e ../swh-deposit
 -e ../swh-graph
+-e ../swh-icinga-plugins
 -e ../swh-indexer
--e ../swh-journal
 -e ../swh-lister
 -e ../swh-loader-core
 -e ../swh-loader-git
 -e ../swh-loader-mercurial
 -e ../swh-loader-svn
--e ../swh-model
--e ../swh-objstorage[testing]
--e ../swh-scheduler
--e ../swh-storage[schemata,listener]
+-e ../swh-search
 -e ../swh-vault
 -e ../swh-web