CI: Enable ASan memory-leak checking

Now that we clean up everything to do with wet_process, we can enable
memleak checking in CI.

Signed-off-by: Daniel Stone <daniels@collabora.com>

.gitlab-ci/virtme-scripts/per-test-asan.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 
 export LSAN_OPTIONS="suppressions=../.gitlab-ci/leak-sanitizer.supp"
-export ASAN_OPTIONS="detect_leaks=0"
+export ASAN_OPTIONS="detect_leaks=1"
 
 exec "$@"