tests: Update resource downloading test to skip x86-parsec

The x86-parsec gem5 Resource (v1.0.0,
http://resources.gem5.org/resources/x86-parsec?version=1.0.0) is 33GB.
The gem5 GitHub Actions self-hosted runners do not have enough Disk
Space in the VMs they are run to download this. Ergo we skip it.

Change-Id: I290fe265f03ceca65b2bed87e9f4a4ad601e0fc1

tests/gem5/gem5_resources/test_download_resources.py

@@ -45,7 +45,12 @@ gem5_verify_config(
         "configs",
         "download_check.py",
     ),
-    config_args=["--download-directory", resource_path],
+    config_args=[
+        "--download-directory",
+        resource_path,
+        "--skip",
+        "x86-parsec",
+    ],
     valid_isas=(constants.all_compiled_tag,),
     length=constants.very_long_tag,
 )