fix: add missing build packages to the snap

[st3v3nmw]

When running make snap-debug, we're getting the following error:

:: dpkg-checkbuilddeps: error: Unmet build dependencies: python3-pycurl python3-netifaces python3-yaml ubuntu-advantage-tools locales-all python3-dbus
:: dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied; aborting
:: dpkg-buildpackage: warning: (Use -d flag to override.)

Likely due to the extra dependencies added here:

Build-Depends: debhelper (>= 11), po-debconf, libdistro-info-perl,
               dh-python, python3-dev, python3-distutils-extra,
               lsb-release, gawk, net-tools,
               python3-apt, python3-twisted, python3-configobj,
               python3-pycurl, python3-netifaces, python3-yaml,
               ubuntu-advantage-tools, locales-all, python3-dbus

[Perfect5th]

LGTM, though I'm not sure this alone gets the build fixed.