Leaks reported with xvfb

When running Visualization tests locally or on the CI with xvfb, memory leaks are reported by asan.
Same with wayland.
2 Callstacks are reported:
- 1 when creating the bgfx renderer. Callstack is detailed enough so it's easy to add it to suppress list
- 1 without module infos. I got no luck trying to extract infos (using gdb) and I could not add it to suppress list. Maybe it's possible but I didn't find a way.

Until it's possible to discard xvfb leaks I've commented the corresponding steps in the CI pipelines.