tex-memoir{,-doc}: update to 3.7q

-- Added memhfixc autoloading to memoir (via \AtEndPackage{hyperref}...), then
  the equivalent code can be removed from hyperref
-- now auto loads the etoolbox package in order to enable a future patching
  approach instead of overwriting kernel macros
-- changed definition of \medspace into \providecommand for better testing
  with older kernels
-- added some code to a hook provided by footmisc fixing a bug with the
  combination of memoir+footmisc+reledmac, especially the 2022 update of
  footmisc
-- fixed typo in manual regarding \setupmaintoc
-- The LaTeX team changed the order of the file/package hook names into a more
  precise scheme. \AtBegin/EndFile, \AtBegin/EndPackage, \AtBegin/EndClass
  changed accordingly

(markd)