stdlib,tests: Update resources to v24.0 in Pyunit test (#1290)

This needs a better fix. I don't like having to update these files for
every release. Though for now, this will mean the tests passing in v24.0

tests/pyunit/stdlib/resources/refs/obtain-resource.json

@@ -10,7 +10,8 @@
         "source": "src/test-source",
         "resource_version": "2.5.0",
         "gem5_versions": [
-            "25.0"
+            "25.0",
+            "24.0"
         ]
     },
     {
@@ -24,7 +25,8 @@
         "source": "src/test-source",
         "resource_version": "2.0.0",
         "gem5_versions": [
-            "23.0"
+            "23.0",
+            "24.0"
         ]
     },
     {
@@ -39,7 +41,8 @@
         "resource_version": "1.7.0",
         "gem5_versions": [
             "develop",
-            "develop-2"
+            "develop-2",
+            "24.0"
         ]
     },
     {
@@ -53,7 +56,8 @@
         "source": "src/test-source",
         "resource_version": "1.5.0",
         "gem5_versions": [
-            "develop"
+            "develop",
+            "24.0"
         ]
     }
 ]