[MM-43337] Updating email templates for trial will end and trial ended emails (#19976)

* Updating email templates for trial will end and trial will end emails

* put back variable

* Rebuilding

* fix tests

* Updates

* [MM-43339] Add Cloud Subscription Upgrade Confirmation Email (#19989)

* Add Cloud Upgrade Confirmation email

* Updates

* String change

* i18n-extract

* Updates

* make email-mocks

* Appease linter

* Add a test

* GMAIL NEVER RENDERS RIGHT

* Important EVERYWHERE because gmail just cant deal

* l

* Last one

* Update image

* Update tests

* Fix tests

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

api4/cloud.go

@@ -111,6 +111,12 @@ func changeSubscription(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	// Log failures for purchase confirmation email, but don't show an error to the user so as not to confuse them
+	// At this point, the upgrade is complete.
+	if nErr := c.App.SendUpgradeConfirmationEmail(); nErr != nil {
+		c.Logger.Error("Error sending purchase confirmation email")
+	}
+
 	w.Write(json)
 }
 
@@ -436,6 +442,11 @@ func handleCWSWebhook(c *Context, w http.ResponseWriter, r *http.Request) {
 			c.Err = nErr
 			return
 		}
+	case model.EventTypeSendUpgradeConfirmationEmail:
+		if nErr := c.App.SendUpgradeConfirmationEmail(); nErr != nil {
+			c.Err = nErr
+			return
+		}
 	case model.EventTypeSendAdminWelcomeEmail:
 		user, appErr := c.App.GetUserByUsername(event.CloudWorkspaceOwner.UserName)
 		if appErr != nil {