Tests: Blocklist failing compositor OpenGL Linux tests

This patch blocklists the node_integer_math, exr_to_png, and png_to_exr
tests on OpenGL Linux. They are failing due to unknown reasons and can't
be reproduced locally.

Pull Request: https://projects.blender.org/blender/blender/pulls/163321

tests/python/compositor_file_output_tests.py

@@ -18,6 +18,13 @@ sys.path.append(current_dir)
 from modules.colored_print import print_message
 
 
+BLOCKLIST_LINUX_GPU = [
+    # Unknown failure than can not be reproduced locally.
+    "png_to_exr.blend",
+    "exr_to_png.blend",
+]
+
+
 class FileOutputTest(unittest.TestCase):
     """
     This class extends the compositor tests by supporting the File Output node.
@@ -192,6 +199,9 @@ class FileOutputTest(unittest.TestCase):
 
         ok = True
         for filename in os.listdir(self.testdir):
+            if self.execution_device == "GPU" and sys.platform == "linux" and filename in BLOCKLIST_LINUX_GPU:
+                continue
+
             test_name, ext = os.path.splitext(filename)
             if ext != '.blend':
                 continue

tests/python/compositor_render_tests.py

@@ -57,14 +57,24 @@ def create_argparse():
     return parser
 
 
+BLOCKLIST_OPENGL_LINUX = [
+    # Unknown failure than can not be reproduced locally.
+    "node_integer_math.blend",
+]
+
+
 def main():
     parser = create_argparse()
     args = parser.parse_args()
 
+    blocklist = []
+    if args.gpu_backend == "opengl" and sys.platform == "linux":
+        blocklist += BLOCKLIST_OPENGL_LINUX
+
     from modules import render_report
     backend = args.gpu_backend if args.gpu_backend else "CPU"
     report_title = f"Compositor {backend.upper()}"
-    report = render_report.Report(report_title, args.outdir, args.oiiotool)
+    report = render_report.Report(report_title, args.outdir, args.oiiotool, variation=None, blocklist=blocklist)
     report.set_pixelated(True)
     report.set_reference_dir("compositor_renders")