[entity,storage] remove hackish code from the bfss path
The ClientConnection/Connection duality brought some painful hacks
that are no longer needed.
Hence we can send entity._cw_update_attr_cache and ._cw_dont_cache_attribute
to the grave.
Related to #3837233
[MESSAGES CONTROL]
disable-msg = C0301
[VARIABLES]
# Enable / disable this checker
enable-variables = yes
additional-builtins = _, display_name
[BASIC]
required-attributes=
attr-rgx = (w|[a-z_][a-z0-9_]{2,30})
variable-rgx = (w|[a-z_][a-z0-9_]{2,30})$
argument-rgx = (w|[a-z_][a-z0-9_]{2,30})$
[TYPECHECK]
generated-members=debug,info,notice,warning,error,critical,exception