hardcode authenticator host in celery manifest

copilot/post-award-celery/manifest.yml

@@ -49,7 +49,6 @@ secrets:
     from_cfn: ${COPILOT_APPLICATION_NAME}-${COPILOT_ENVIRONMENT_NAME}-postawardclusterAuroraSecret
   REDIS_URL:
     from_cfn: ${COPILOT_APPLICATION_NAME}-${COPILOT_ENVIRONMENT_NAME}-PostAwardRedisUrl
-  AUTHENTICATOR_HOST: /copilot/${COPILOT_APPLICATION_NAME}/${COPILOT_ENVIRONMENT_NAME}/secrets/POST_AWARD_AUTHENTICATOR_HOST
   SECRET_KEY: /copilot/${COPILOT_APPLICATION_NAME}/${COPILOT_ENVIRONMENT_NAME}/secrets/POST_AWARD_SECRET_KEY
   RSA256_PUBLIC_KEY_BASE64: /copilot/${COPILOT_APPLICATION_NAME}/${COPILOT_ENVIRONMENT_NAME}/secrets/POST_AWARD_RSA256_PUBLIC_KEY_BASE64
   TF_ADDITIONAL_EMAIL_LOOKUPS: /copilot/${COPILOT_APPLICATION_NAME}/${COPILOT_ENVIRONMENT_NAME}/secrets/POST_AWARD_TF_ADDITIONAL_EMAIL_LOOKUPS
@@ -63,13 +62,16 @@ environments:
       FIND_SERVICE_BASE_URL: https://find-monitoring-data.access-funding.levellingup.gov.uk
       SUBMIT_HOST: submit-monitoring-data.access-funding.levellingup.gov.uk
       FIND_HOST: find-monitoring-data.access-funding.levellingup.gov.uk
+      AUTHENTICATOR_HOST: https://authenticator.access-funding.${COPILOT_ENVIRONMENT_NAME}.communities.gov.uk
   test:
     variables:
       FIND_SERVICE_BASE_URL: https://find-monitoring-data.access-funding.test.communities.gov.uk
       SUBMIT_HOST: submit-monitoring-data.access-funding.test.communities.gov.uk
       FIND_HOST: find-monitoring-data.access-funding.test.communities.gov.uk
+      AUTHENTICATOR_HOST: https://account.access-funding.${COPILOT_ENVIRONMENT_NAME}.communities.gov.uk
   dev:
     variables:
       FIND_SERVICE_BASE_URL: https://find-monitoring-data.access-funding.dev.communities.gov.uk
       SUBMIT_HOST: submit-monitoring-data.access-funding.dev.communities.gov.uk
       FIND_HOST: find-monitoring-data.access-funding.dev.communities.gov.uk
+      AUTHENTICATOR_HOST: https://account.access-funding.${COPILOT_ENVIRONMENT_NAME}.communities.gov.uk