Migrate to debhelper 13

[ryonakano]

Preparation for #364 (I'll add a designated systemd service file, and systemd service files are automatically set as enabled since debhelper 12)

Changes Summary

• Migrate to debhelper 13
• Address errors and warnings appeared due to migration

Checklist

• No lintian errors and warnings are shown when building for Resolute and Noble

stdout when building for Resolute

dpkg-deb: building package 'elementary-default-settings' in '../elementary-default-settings_8.1.1_all.deb'.
dpkg-deb: building package 'elementary-printer-test-page' in '../elementary-printer-test-page_8.1.1_all.deb'.
 dpkg-genbuildinfo -O../elementary-default-settings_8.1.1_amd64.buildinfo
 dpkg-genchanges -O../elementary-default-settings_8.1.1_amd64.changes
dpkg-genchanges: info: including full source code in upload
 dpkg-source --after-build .
dpkg-buildpackage: info: full upload; Debian-native package (full source is included)
Now running lintian elementary-default-settings_8.1.1_amd64.changes ...
running with root privileges is not recommended!
Finished running lintian.

• The built .deb files can be installed on OS 9 Daily and OS 8 Daily successfully

stdout when installing on OS 9 Daily

user@Standard-PC-Q35-ICH9-2009-359d943f:~$ sudo apt install ./*.deb
Note, selecting 'elementary-default-settings' instead of './elementary-default-settings_8.1.1_all.deb'
Note, selecting 'elementary-printer-test-page' instead of './elementary-printer-test-page_8.1.1_all.deb'
DOWNGRADING:                
  elementary-default-settings  elementary-printer-test-page

Summary:
  Upgrading: 0, Installing: 0, Downgrading: 2, Removing: 0, Not Upgrading: 0
  Download size: 0 B / 116 kB
  Freed space: 2,048 B

Continue? [Y/n] y
Get:1 /home/user/elementary-default-settings_8.1.1_all.deb elementary-default-settings all 8.1.1 [12.6 kB]
Get:2 /home/user/elementary-printer-test-page_8.1.1_all.deb elementary-printer-test-page all 8.1.1 [104 kB]
dpkg: warning: downgrading elementary-default-settings (8.1.1+r456+pkg319~daily~ubuntu9.1) to (8.1.1)
(Reading database… 154013 files and directories currently installed.)
Preparing to unpack …/elementary-default-settings_8.1.1_all.deb…
update-alternatives: using /usr/share/icons/Adwaita/cursor.theme to provide /usr/share/icons/default/index.theme (x-cursor-th
eme) in auto mode
Unpacking elementary-default-settings (8.1.1) over (8.1.1+r456+pkg319~daily~ubuntu9.1)…
dpkg: warning: downgrading elementary-printer-test-page (8.1.1+r456+pkg319~daily~ubuntu9.1) to (8.1.1)
Preparing to unpack …/elementary-printer-test-page_8.1.1_all.deb…
Leaving “diversion of /usr/share/cups/data/default-testpage.pdf to /usr/share/cups/data/default-testpage.pdf.real by elementa
ry-printer-test-page”
Unpacking elementary-printer-test-page (8.1.1) over (8.1.1+r456+pkg319~daily~ubuntu9.1)…
Setting up elementary-printer-test-page (8.1.1)…
Setting up elementary-default-settings (8.1.1)…
update-alternatives: using /usr/share/icons/elementary/cursor.theme to provide /usr/share/icons/default/index.theme (x-cursor
-theme) in manual mode
rm: cannot remove '/etc/apparmor.d/bwrap-userns-restrict': No such file or directory
Processing triggers for desktop-file-utils (0.28-1build1)…
Processing triggers for libglib2.0-0t64:amd64 (2.88.0-1)…
Notice: Download is performed unsandboxed as root as file '/home/user/elementary-default-settings_8.1.1_all.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
user@Standard-PC-Q35-ICH9-2009-359d943f:~$