Remove step duplication from feature

By using the `Background` Gherkin keyword

Author: wlsf82

cypress/e2e/engagesphere/greeting/greeting.feature

@@ -1,11 +1,12 @@
 Feature: Greeting
 
-  Scenario: shows the default greeting
+  Background: access EngageSphere with the cookies consent banner already accepted
     Given I access the EngageSphare app having already accepted the cookies banner
+
+  Scenario: shows the default greeting
     Then I see the following greeting: Hi there!
 
   Scenario: shows a customized greeting
-    Given I access the EngageSphare app having already accepted the cookies banner
     When I type "<name>" in the name input field
     Then I see the following greeting: Hi "<name>"!
     And I see the following icon: "<icon>"