[PLT-7793] Added /users/tokens endpoint (#8038)

* Added /users/tokens/all endpoint

- UserAccessStore now has getAll method
- Added tests
- Added route
- Added handler

* Remove space fix check-style

* Remove blank space check-style

* Fixes for make check-style

* Remove extra code that is un-needed in user_test.go

* Rename endpoint + grammar

- Renamed /users/tokens/all to /users/tokens
- Renamed getUserAccessTokens to getUserAccessTokensForUser
- Renamed getAllUserAccessTokens to getUserAccessTokens
- Minor Grammar changes

* Add localization for sql_user_access_token.get_all

* Fix minor plural spelling

i18n/en.json

@@ -6782,6 +6782,10 @@
     "id": "store.sql_user_access_token.get_by_token.app_error",
     "translation": "We couldn't get the personal access token by token"
   },
+  {
+    "id": "store.sql_user_access_token.get_all.app_error",
+    "translation": "We couldn't get all personal access tokens"
+  },
   {
     "id": "store.sql_user_access_token.get_by_user.app_error",
     "translation": "We couldn't get the personal access tokens by user"