fix: associate extHost lifecycle to window (#292672)

* fix: associate extHost lifecycle to window

* chore: update test/smoke/src/areas/extensions/extension-host-restart.test.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* fix: add grace period when tracking extension host lifecycle

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

test/smoke/extensions/vscode-smoketest-ext-host/package.json

@@ -0,0 +1,29 @@
+{
+	"name": "vscode-smoketest-ext-host",
+	"displayName": "Smoke Test Extension Host",
+	"description": "Extension for smoke testing extension host lifecycle",
+	"version": "0.0.1",
+	"publisher": "vscode",
+	"license": "MIT",
+	"private": true,
+	"engines": {
+		"vscode": "^1.55.0"
+	},
+	"activationEvents": [
+		"onStartupFinished"
+	],
+	"main": "./extension.js",
+	"extensionKind": ["ui"],
+	"contributes": {
+		"commands": [
+			{
+				"command": "smoketest.getExtensionHostPidAndBlock",
+				"title": "Smoke Test: Get Extension Host PID and Block"
+			},
+			{
+				"command": "smoketest.setupGracefulDeactivation",
+				"title": "Smoke Test: Setup Graceful Deactivation"
+			}
+		]
+	}
+}