WT-6682 introduced HS validation. Currently, the HS validation is performed when verify_metadata is given as one of the configuration items when opening a connection. We would like to keep this behaviour but add a new configuration item called verify_hs which would trigger HS validation as well.

The work of this ticket consists in:

• Adding a new configuration item for the connection verify_hs
• Update the code so this new item is parsed and HS validation is executed when verify_metadata or verify_hs is present in the connection configuration
• Write a test for the new configuration item