tests: reduce logs coming from libpipewire

These tests are meant to catch wireplumber issues, so the libpipewire
logs are not very interesting and just make it hard to go through
the interesting bits

tests/meson.build

@@ -38,7 +38,7 @@ common_test_env = environment({
   'FILE_MONITOR_DIR': meson.current_build_dir() / '.local' / 'file_monitor',
   'WIREPLUMBER_DATA_DIR': meson.current_source_dir() / '..' / 'src',
   'WIREPLUMBER_MODULE_DIR': meson.current_build_dir() / '..' / 'modules',
-  'WIREPLUMBER_DEBUG': 'T',
+  'WIREPLUMBER_DEBUG': 'T,pw.*:I,spa.*:I,mod.*:I',
 })
 
 spa_plugindir = spa_dep.get_variable(