Open SSH version 9.4

This feature includes an upgrade of of Junos OS Evolved from version of OpenSSH from 7.5 to 9.4. The following SSH changes are a result of this upgrade:

• The preferred signing algorithm has changed from ECDSA to ED25519.
• The scp command now uses Secure File Transfer Protocol (SFTP) for file transfers by default. If you prefer to use the legacy SCP protocol, include the -O option when running the scp command.
• SSH protocol version 1 has been removed.