podman farm update enhancement

[yuhuijiang]

Issue Description

"podman farm update --add testcon1 testfarm1" will perform successfully, even though the connection name "testcon1" not exist or the farm name "testfarm1" not exist.
this issue both exists in "podman farm update --add/--remove/--default"

Steps to reproduce the issue

Steps to reproduce the issue
1.[root@sweetpig-6 ~]# podman farm list
Name Connections Default
demo [] true
2.[root@sweetpig-6 ~]# podman system connection list
Name URI Identity Default
rhel86_aarch ssh://root@ampere-mtsnow-altra-01-vm-14.lab.eng.rdu2.redhat.com:22/run/podman/podman.sock false
rhel88_aarch ssh://root@arm-virt-02.lab.eng.pek2.redhat.com:22/run/podman/podman.sock false
rhel88_ppc64 ssh://root@ibm-p9z-06-lp10.khw3.lab.eng.bos.redhat.com:22/run/podman/podman.sock true
rhel88_s390 ssh://root@s390x-kvm-073.lab.eng.rdu2.redhat.com:22/run/podman/podman.sock false
3.[root@sweetpig-6 ~]# podman farm update --add testcon1 testfarm1
Farm "testfarm1" updated

Describe the results you received

Farm "testfarm1" updated

Describe the results you expected

podman should exit with error and prompt
WARN[0000] farm "testfarm1" doesn't exist; nothing to update
Error: failed to update farms ["testfarm1"]

podman info output

If you are unable to run podman info for any reason, please provide the podman version, operating system and its version and the architecture you are running.

Podman in a container

No

Privileged Or Rootless

None

Upstream Latest Release

Yes

Additional environment details

Additional environment details

Additional information

Additional information like issue happens only occasionally or issue happens with a particular architecture or on a particular setting

[rhatdan]

@umohnani8 PTAL