Remove certifi limitations from eager upgrade limits (#23995)

The certifi limitation was introduced to keep snowflake happy while
performing eager upgrade because it added limits on certifi. However
seems like it is not limitation any more in latest versions of
snowflake python connector, so we can safely remove it from here.

The only remaining limit is dill but this one still holds.

(cherry picked from commit e41b5a0)

Dockerfile.ci

@@ -1174,9 +1174,8 @@ RUN echo "Airflow version: ${AIRFLOW_VERSION}"
 
 # Those are additional constraints that are needed for some extras but we do not want to
 # force them on the main Airflow package. Those limitations are:
-# * certifi<2021.0.0: required by snowflake provider
 # * dill<0.3.3 required by apache-beam
-ARG EAGER_UPGRADE_ADDITIONAL_REQUIREMENTS="dill<0.3.3 certifi<2021.0.0"
+ARG EAGER_UPGRADE_ADDITIONAL_REQUIREMENTS="dill<0.3.3"
 ARG UPGRADE_TO_NEWER_DEPENDENCIES="false"
 ENV EAGER_UPGRADE_ADDITIONAL_REQUIREMENTS=${EAGER_UPGRADE_ADDITIONAL_REQUIREMENTS} \
     UPGRADE_TO_NEWER_DEPENDENCIES=${UPGRADE_TO_NEWER_DEPENDENCIES}