ID_INTEGRATION is not being updated with hwdb entries, asign the new
value to it when hwdb has been imported.
We still need the 65-integration.rule assignment for devices that aren't
in hwdb.
While at it remove unneeded check in 70-touchpad.rules, as it was not
added for 70-joystick.rules with the statement if ID_INPUT_* is set and
ID_INPUT not, there is a bug elsewhere. And remove unneeded gotos in
both files.
Follow-up for a4381cae8b.
This change is only about the source tree. We have tmpfiles.d/, modprobe.d/,
sysctl.d/, and sysusers.d/, but for historical reasons, rules/ didn't fit this
pattern. We also *install* it as rules.d/. Let's rename to be consistent.