feat: add email to A/B function (#44187)

* feat: add email to A/B function

* fix: declare types for sha-1

* Update client/src/utils/A-B-tester.ts

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* feat: add custom dimesions for donation events

* feat: re-order if statemetns

* Apply suggestions from code review

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: assuage TypeScript

* update rename

* rename vars

* update naming

* re add types

* Update client/src/redux/ga-saga.js

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

client/src/redux/ga-saga.test.js

@@ -11,8 +11,8 @@ describe('ga-saga', () => {
     const mockEventPayload = {
       type: 'event',
       data: {
-        category: 'Donation',
-        action: 'year end gift paypal button click'
+        category: 'Map Challenge Click',
+        action: '/learn'
       }
     };
     return (