Make requested changes to the subnav (#27412)

- Remove Olympics 2024 from the main subnav
- Remove Olympics 2024 from the US sport front subnav
- Add Democratic national convention to the main subnav

common/app/navigation/NavLinks.scala

@@ -99,6 +99,9 @@ object NavLinks {
 
   val auBusiness = ukBusiness.copy(children = List(markets, money, projectSyndicate, retail))
 
+  val democraticNationalConvention =
+    NavLink("Democratic national convention", "/us-news/democratic-national-convention-2024")
+
   /* OPINION */
   val columnists = NavLink("Columnists", "/index/contributors")
   val auColumnists = NavLink("Columnists", "/au/index/contributors")
@@ -313,10 +316,10 @@ object NavLinks {
     List(
       usNews,
       usElections2024,
+      democraticNationalConvention,
       world,
       usEnvironment,
       ukraine,
-      olympics2024,
       usSoccer,
       usBusiness,
       usTech,
@@ -420,7 +423,6 @@ object NavLinks {
   )
   val usSportPillar = ukSportPillar.copy(
     children = List(
-      olympics2024,
       usSoccer,
       NFL,
       tennis,

common/test/resources/reference-navigation.json

@@ -1018,6 +1018,12 @@
 					"children": [],
 					"classList": []
 				},
+				{
+					"title": "Democratic national convention",
+					"url": "/us-news/democratic-national-convention-2024",
+					"children": [],
+					"classList": []
+				},
 				{
 					"title": "World",
 					"url": "/world",
@@ -1125,12 +1131,6 @@
 					"children": [],
 					"classList": []
 				},
-				{
-					"title": "Olympics 2024",
-					"url": "/sport/olympic-games-2024",
-					"children": [],
-					"classList": []
-				},
 				{
 					"title": "Soccer",
 					"url": "/us/soccer",
@@ -1283,12 +1283,6 @@
 			"longTitle": "Sport home",
 			"iconName": "home",
 			"children": [
-				{
-					"title": "Olympics 2024",
-					"url": "/sport/olympic-games-2024",
-					"children": [],
-					"classList": []
-				},
 				{
 					"title": "Soccer",
 					"url": "/us/soccer",