dh_installinfo: No longer inserts install-info calls into maintainer scripts

dh_installinfo: No longer inserts install-info calls into maintainer scripts

as that is now triggerized. Adds a dependency via misc:Depends to handle
partial upgrades. Note that while dh_installinfo already required that info
files had a INFO-DIR-SECTION, the new system also requires they have
START-INFO-DIR-ENTRY and END-INFO-DIR-ENTRY for proper registration. I
assume there will be some mass bug filing for any packages that do not have
that. Closes: #528864