fix: vscode-testextension/package.json & vscode-testextension/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BRACEEXPANSION-17706650

Author: snyk-bot

vscode-testextension/package-lock.json

@@ -59,7 +59,7 @@
         "typescript": "^5.2.2"
     },
     "dependencies": {
-        "vscode-languageclient": "^9.0.1",
+        "vscode-languageclient": "^10.0.0",
         "vscode-languageserver-protocol": "^3.17.5"
     }
 }