Do not refresh cookie on config update (#3593)

Task/Issue URL:
https://app.asana.com/0/1201037661562251/1208835217248246/f

**Description**:
Do not refresh cookie on config update

**Steps to test this PR**:
Fix for crash when `subscriptionCookieManager` accessed WebKit datastore
not on the main thread when the privacy config had update with enabled
`setAccessTokenCookieForSubscriptionDomains` feature flag.

DuckDuckGo/Application/AppDelegate.swift

@@ -394,10 +394,9 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
 
                 let isEnabled = privacyConfigurationManager.privacyConfig.isSubfeatureEnabled(PrivacyProSubfeature.setAccessTokenCookieForSubscriptionDomains)
 
-                Task { [weak self] in
+                Task { @MainActor [weak self] in
                     if isEnabled {
                         self?.subscriptionCookieManager.enableSettingSubscriptionCookie()
-                        await self?.subscriptionCookieManager.refreshSubscriptionCookie()
                     } else {
                         await self?.subscriptionCookieManager.disableSettingSubscriptionCookie()
                     }