tests: add -o PubkeyAcceptedAlgorithms=+ssh-rsa to ssh

Could not find the change about this, but the workaround works.

Signed-off-by: Huijing Hei <hhei@redhat.com>

Author: HuijingHei

crates/xtask/src/tmt.rs

@@ -209,7 +209,7 @@ fn verify_ssh_connectivity(sh: &Shell, port: u16, key_path: &Utf8Path) -> Result
         // Use IdentitiesOnly=yes to prevent ssh-agent from offering other keys
         let result = cmd!(
             sh,
-            "ssh -i {key_path} -p {port_str} -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=5 -o IdentitiesOnly=yes root@localhost 'export TEST=value; whoami'"
+            "ssh -i {key_path} -p {port_str} -o PubkeyAcceptedAlgorithms=+ssh-rsa -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=5 -o IdentitiesOnly=yes root@localhost 'export TEST=value; whoami'"
         )
         .ignore_stderr()
         .read();