Development: allow devcontainer pytest to find tests (#10671)

* Fix:[settings.json]:  update pytest configuration in VSCode settings

* chore[pckage.json]: Add pnmp as packagemanager

* Chore[package.json]: revert

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Co-authored-by: Trenton H <797416+stumpylog@users.noreply.github.com>

.devcontainer/vscode/settings.json

@@ -1,11 +1,10 @@
 {
-    "python.testing.pytestArgs": [
-        "src"
-    ],
+    "python.testing.pytestArgs": [],
     "python.testing.unittestEnabled": false,
     "python.testing.pytestEnabled": true,
     "files.watcherExclude": {
         "**/.venv/**": true,
         "**/pytest_cache/**": true
-    }
+    },
+    "python.testing.cwd": "${workspaceFolder}/src"
 }