Remove footer and rightside of the navbar on the interstitial payment page (#8407)

Co-authored with Thomas Mees (thomas.mees@overleaf.com)

GitOrigin-RevId: 270e11f0cfd09830e5c7600d636b8ebbfc6049a2

services/web/app/views/layout/navbar.pug

@@ -1,6 +1,7 @@
 nav.navbar.navbar-default.navbar-main
 	.container-fluid
 		.navbar-header
+			if (typeof(suppressNavbarRight) == "undefined")
 				button.navbar-toggle(ng-init="navCollapsed = true", ng-click="navCollapsed = !navCollapsed", ng-class="{active: !navCollapsed}", aria-label="Toggle " + translate('navigation'))
 					i.fa.fa-bars(aria-hidden="true")
 			if settings.nav.custom_logo
@@ -13,6 +14,8 @@ nav.navbar.navbar-default.navbar-main
 		- var canDisplayAdminMenu = hasAdminAccess()
 		- var canDisplayAdminRedirect = canRedirectToAdminDomain()
 		- var canDisplaySplitTestMenu = hasFeature('saas') && (canDisplayAdminMenu || (getSessionUser() && getSessionUser().staffAccess && (getSessionUser().staffAccess.splitTestMetrics || getSessionUser().staffAccess.splitTestManagement)))
+
+		if (typeof(suppressNavbarRight) == "undefined")
 			.navbar-collapse.collapse(collapse="navCollapsed")
 				ul.nav.navbar-nav.navbar-right
 					if (canDisplayAdminMenu || canDisplayAdminRedirect || canDisplaySplitTestMenu)

services/web/app/views/subscriptions/interstitial-payment.pug

@@ -1,4 +1,4 @@
-extends ../layout-marketing
+extends ../layout
 
 include ./plans-marketing/_mixins
 include ./plans-marketing/_tables
@@ -6,6 +6,8 @@ include ./plans-marketing/v2/_mixins
 
 block vars
 	- entrypoint = 'pages/user/subscription/plans-v2/plans-v2-main'
+	- var suppressFooter = true
+	- var suppressNavbarRight = true
 
 block append meta
 	meta(name="ol-recommendedCurrency" content=recommendedCurrency)