Increase server start timeout (#7788)

Author: dibarbet

package.json

@@ -1433,7 +1433,7 @@
           "dotnet.server.startTimeout": {
             "type": "number",
             "scope": "machine-overridable",
-            "default": 30000,
+            "default": 120000,
             "description": "%configuration.dotnet.server.startTimeout%"
           },
           "dotnet.server.waitForDebugger": {