Revert changes from main commits that were merged into blender-v4.1-release

The last good commit was f57e4c5b98.

After this one more fix was committed, this one is preserved as well:
67bd678887.

tests/python/cycles_render_tests.py

@@ -69,6 +69,7 @@ def get_arguments(filepath, output_filepath):
 
     args = [
         "--background",
+        "-noaudio",
         "--factory-startup",
         "--enable-autoexec",
         "--debug-memory",
@@ -145,7 +146,7 @@ def main():
     # underwater_caustics.blend gives quite different results on Linux and Intel macOS compared to
     # Windows and Arm macOS.
     test_dir_name = Path(test_dir).name
-    if test_dir_name in {'motion_blur', 'integrator'}:
+    if test_dir_name in ('motion_blur', 'integrator', ):
         report.set_fail_threshold(0.032)
 
     ok = report.run(test_dir, blender, get_arguments, batch=args.batch)