lazily replaying sql bindings for session manager

This is similar to https://github.com/pingcap/tidb/issues/35806:
Replaying SQL bindings needs to parse the hints because the hints are hard to be encoded. So after the table / db is dropped / altered, sql_mode is changed, or privilege is updated, replaying sql bindings may encounter an error.
A solution is to delay the replaying until it's really accessed.