cubicweb #3837233 [repoapi] fold ClientConnection and Connection [resolved]

These are remnants of the web fence and need not be kept separate.

prioritynormal
typeenhancement
done in3.21.0
load3.000
load left0.000
closed by#635cfac73d28 [repoapi] fold ClientConnection into Connection
patch[entity/req] pass the _cw object to cw_instantiate [rejected][connection] eliminate ClientConnection leftovers [applied][session] all cnx._session become cnx.session [applied][session] provide missing apis to Connection [applied][session/cnx] remove `session_handled` logic [applied][repoapi] reduce repoapi usage where possible [applied][entity,storage] remove hackish code from the bfss path [applied][repoapi] fold ClientConnection into Connection [applied][rset] kill the rset._rqlst cache [applied][repoapi] fold ClientConnection into Connection [folded]