tests: add a reftest for BZ#689832

GNOME/librsvg#70 (originally BZ#689832)
seems fixed in 2.44. Add the testcase to the reftests.
3 jobs for <span class="ref-name">bz689832</span> in 7 minutes and 55 seconds (queued for 106 minutes and 14 seconds)
Status Job ID Name Coverage
  Test
passed #94855
fedora test

00:07:37

 
  Lint
manual #94857
allowed to fail manual
clippy
passed #94856
rustfmt

00:00:18