Add description for python.experiment settings values (#20751)

Author: Kartik Raj

package.json

@@ -427,6 +427,11 @@
                             "All",
                             "pythonSurveyNotification",
                             "pythonPromptNewToolsExt"
+                        ],
+                        "enumDescriptions": [
+                            "%python.experiments.All.description%",
+                            "%python.experiments.pythonSurveyNotification.description%",
+                            "%python.experiments.pythonPromptNewToolsExt.description%"
                         ]
                     },
                     "scope": "machine",
@@ -441,6 +446,11 @@
                             "All",
                             "pythonSurveyNotification",
                             "pythonPromptNewToolsExt"
+                        ],
+                        "enumDescriptions": [
+                            "%python.experiments.All.description%",
+                            "%python.experiments.pythonSurveyNotification.description%",
+                            "%python.experiments.pythonPromptNewToolsExt.description%"
                         ]
                     },
                     "scope": "machine",

package.nls.json

@@ -34,6 +34,9 @@
     "python.experiments.enabled.description": "Enables A/B tests experiments in the Python extension. If enabled, you may get included in proposed enhancements and/or features.",
     "python.experiments.optInto.description": "List of experiment to opt into. If empty, user is assigned the default experiment groups. See [here](https://github.com/microsoft/vscode-python/wiki/AB-Experiments) for more details.",
     "python.experiments.optOutFrom.description": "List of experiment to opt out of. If empty, user is assigned the default experiment groups. See [here](https://github.com/microsoft/vscode-python/wiki/AB-Experiments) for more details.",
+    "python.experiments.All.description": "Combined list of all experiments.",
+    "python.experiments.pythonSurveyNotification.description": "Denotes the Python Survey Notification experiment.",
+    "python.experiments.pythonPromptNewToolsExt.description": "Denotes the Python Prompt New Tools Extension experiment.",
     "python.formatting.autopep8Args.description": "Arguments passed in. Each argument is a separate item in the array.",
     "python.formatting.autopep8Path.description": "Path to autopep8, you can use a custom version of autopep8 by modifying this setting to include the full path.",
     "python.formatting.blackArgs.description": "Arguments passed in. Each argument is a separate item in the array.",