Make all page endpoints constants

- fix all cypress tests
- refactor all test to use LegacyTests/constants/PAGES_ENDPOINTS
- gatsby-config to use PAGES_ENDPOINTS
- remove ScoreStepList component
- update J40Header to use constants.PAGES_ENDPOINTS
- update snapshots
- there are 3 locations to update PAGES_ENDPOINTS, namely

1. LegacyTests/constants.tsx
2. constants.tsx
3. gatsby-config

client/cypress/integration/LegacyTests/constants.js

@@ -1,8 +1,10 @@
-export const ENDPOINTS = {
-  EXPLORE_THE_TOOL: 'en/',
-  ABOUT: '/en/about',
-  METHODOLOGY: '/en/methodology',
-  CONTACT: 'en/contact',
-  PUBLIC: 'en/public-engagement',
-  DOWNLOAD: 'en/downloads',
+export const PAGES_ENDPOINTS = {
+  EXPLORE: '/',
+  METHODOLOGY: '/methodology',
+  DOWNLOADS: '/downloads',
+  TSD: '/technical-support-document',
+  ABOUT: '/about',
+  FAQS: '/faqs',
+  PUBLIC_ENG: '/public-engagement',
+  CONTACT: '/contact',
 };