[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>

templates/partials/style.css

@@ -15,6 +15,7 @@
   line-height: 36px !important;
   letter-spacing: -0.01em !important;
   color: #3F4350 !important;
+  font-family: Open Sans, sans-serif !important;
 }
 
 .subTitle div {
@@ -36,6 +37,16 @@
   padding: 15px 24px !important;
 }
 
+.button-cloud a {
+  background-color: #1C58D9 !important;
+  font-weight: 400 !important;
+  font-family: Open Sans, sans-serif !important;
+  font-size: 16px !important;
+  line-height: 18px !important;
+  color: #FFFFFF !important;
+  padding: 15px 24px !important;
+}
+
 .messageButton a{
   background-color: #FFFFFF !important;
   border: 1px solid #FFFFFF !important;