[CLD-6536] Adjustments to cloud annual renewal announcement bar (#25927)

* Adjustments to cloud annual renewal announcement bar

* Add exclusion for trials

* Add more exceptions for when on trial during renewal period

* Add support for simulated_current_time_ms

* A few more changes to allow us to test this post-merge

* Fix tests, pipeline

* Final fix around emails

---------

Co-authored-by: Mattermost Build <build@mattermost.com>

server/public/model/cloud.go

@@ -5,8 +5,6 @@ package model
 
 import (
 	"encoding/json"
-	"os"
-	"strconv"
 	"strings"
 	"time"
 )
@@ -185,17 +183,16 @@ type Subscription struct {
 	BillingType             string   `json:"billing_type"`
 	CancelAt                *int64   `json:"cancel_at"`
 	WillRenew               string   `json:"will_renew"`
+	SimulatedCurrentTimeMs  *int64   `json:"simulated_current_time_ms"`
 }
 
 func (s *Subscription) DaysToExpiration() int64 {
 	now := time.Now().UnixMilli()
-	// Allows us to base the current time off of an environment variable for testing purposes
 	if GetServiceEnvironment() == ServiceEnvironmentTest {
-		if currTime, set := os.LookupEnv("CLOUD_MOCK_CURRENT_TIME"); set {
-			timeInt, err := strconv.ParseInt(currTime, 10, 64)
-			if err == nil {
-				now = time.Unix(timeInt, 0).UnixMilli()
-			}
+		// In the test environment we have test clocks. A test clock is a ms timestamp
+		// If it's not nil, we use it as the current time in all calculations
+		if s.SimulatedCurrentTimeMs != nil {
+			now = *s.SimulatedCurrentTimeMs
 		}
 	}
 	daysToExpiry := (s.EndAt - now) / (1000 * 60 * 60 * 24)