[python_basic_gevent] collapse per-greenlet assertions into one regex-labeled assertion

The previous file had ten near-identical assertions, one per Greenlet-N
task name, each expecting ~1.0e9 ns of wall-time. CI on Python 3.12
showed the per-greenlet task-name assignment is not deterministic across
runs — one run had every greenlet at ~0.93e9 (all pass), the next had
Greenlet-0 at 1.8e9 (absorbed Greenlet-1's samples) and Greenlet-1 at 0
(two assertion failures). Total wall-time was conserved either way.

Pinning ten separate assertions to specific Greenlet-N IDs makes this
scenario brittle against task-naming order that the profiler doesn't
guarantee. Collapse them to one assertion using `values_regex` that
matches any `Greenlet-N` task name and sums to ~10 s of wall-time
(10 workers × 1 s each), which is the actual invariant the test cares
about.

Author: taegyunkim

scenarios/python_basic_gevent/expected_profile.json

@@ -29,199 +29,16 @@
       "stack-content": [
         {
           "regular_expression": ".*target.*",
-          "value": 1000000000,
+          "value": 10000000000,
           "error_margin": 25,
           "labels": [
             {
               "key": "task name",
-              "values": [
-                "Greenlet-0"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-1"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-2"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-3"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-4"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-5"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-6"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-7"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-8"
-              ],
-              "values_regex": ""
-            }
-          ]
-        }
-      ]
-    },
-    {
-      "profile-type": "wall-time",
-      "pprof-regex": "",
-      "stack-content": [
-        {
-          "regular_expression": ".*target.*",
-          "value": 1000000000,
-          "error_margin": 25,
-          "labels": [
-            {
-              "key": "task name",
-              "values": [
-                "Greenlet-9"
-              ],
-              "values_regex": ""
+              "values_regex": "^Greenlet-[0-9]+$"
             }
           ]
         }
       ]
     }
   ]
-}
+}