eng: avoid duplicate prelaunch task runs

Fixes microsoft#112078

Author: connor4312

.vscode/launch.json

@@ -203,7 +203,7 @@
 		{
 			"type": "pwa-chrome",
 			"request": "launch",
-			"name": "Launch VS Code",
+			"name": "Launch VS Code Internal",
 			"windows": {
 				"runtimeExecutable": "${workspaceFolder}/scripts/code.bat"
 			},
@@ -235,7 +235,9 @@
 				"${workspaceFolder}/out/**/*.js"
 			],
 			"browserLaunchLocation": "workspace",
-			"preLaunchTask": "Ensure Prelaunch Dependencies",
+			"presentation": {
+				"hidden": true,
+			}
 		},
 		{
 			"type": "node",
@@ -472,7 +474,7 @@
 			"name": "VS Code",
 			"stopAll": true,
 			"configurations": [
-				"Launch VS Code",
+				"Launch VS Code Internal",
 				"Attach to Main Process",
 				"Attach to Extension Host",
 				"Attach to Shared Process",
@@ -486,7 +488,7 @@
 		{
 			"name": "Search and Renderer processes",
 			"configurations": [
-				"Launch VS Code",
+				"Launch VS Code Internal",
 				"Attach to Search Process"
 			],
 			"presentation": {
@@ -497,7 +499,7 @@
 		{
 			"name": "Renderer and Extension Host processes",
 			"configurations": [
-				"Launch VS Code",
+				"Launch VS Code Internal",
 				"Attach to Extension Host"
 			],
 			"presentation": {
@@ -526,6 +528,14 @@
 				"group": "1_vscode",
 				"order": 2
 			}
-		}
+		},
+		{
+			"name": "Launch VS Code",
+			"stopAll": true,
+			"configurations": [
+				"Launch VS Code Internal",
+			],
+			"preLaunchTask": "Ensure Prelaunch Dependencies"
+		},
 	]
 }