devtool: add HostKeyAlgorithms option to ssh and scp commands

With the newer version of ssh in Ubuntu 22.04 we are getting errors of this type:

Unable to negotiate with 192.168.7.2 port 22: no matching host key type found. Their offer: ssh-rsa

Add -o HostKeyAlgorithms=+ssh-rsa to command invocation as suggested at:

http://www.openssh.com/legacy.html

(From OE-Core rev: 9275d23c782071382c201bca2d647f6426a64e2f)

Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/selftest/cases/devtool.py

@@ -1323,7 +1323,7 @@ class DevtoolExtractTests(DevtoolBase):
             # Now really test deploy-target
             result = runCmd('devtool deploy-target -c %s root@%s' % (testrecipe, qemu.ip))
             # Run a test command to see if it was installed properly
-            sshargs = '-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+            sshargs = '-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o HostKeyAlgorithms=+ssh-rsa'
             result = runCmd('ssh %s root@%s %s' % (sshargs, qemu.ip, testcommand))
             # Check if it deployed all of the files with the right ownership/perms
             # First look on the host - need to do this under pseudo to get the correct ownership/perms