feat: use discount info endpoint for streak discount information (openedx#1763) (#7)

Co-authored-by: Nawfal Ahmed <111358247+NawfalAhmed@users.noreply.github.com>

.env.development

@@ -12,6 +12,7 @@ CREDIT_HELP_LINK_URL='https://help.edx.org/edxlearner/s/article/Can-I-receive-co
 CSRF_TOKEN_API_PATH='/csrf/api/v1/token'
 DISCOVERY_API_BASE_URL='http://localhost:18381'
 DISCUSSIONS_MFE_BASE_URL='http://localhost:2002'
+DISCOUNT_CODE_INFO_URL=''
 ECOMMERCE_BASE_URL='http://localhost:18130'
 ENABLE_JUMPNAV='true'
 ENABLE_NOTICES=''