🐛 Handle ssh connection errors

[czunker]

Fixes #1812

[czunker]

ssh connection errors now look like this:

cnquery run ssh -i ~/Downloads/christian\ \(1\).pem [email protected] -c "asset{ name title ids }" --verbose                                                              
! CLI pre-processing encountered an issue error="unknown shorthand flag: 'i' in -i"
DBG using provider os with connector ssh
! using builtin provider for os
→ loaded configuration from /etc/opt/mondoo/mondoo.yml using source default
DBG ssh> could not read ssh config error="open /home/christian/.ssh/config: no such file or directory" file=/home/christian/.ssh/config
DBG load ssh known_hosts file file=/home/christian/.ssh/known_hosts
DBG load ssh known_hosts file file=/home/christian/.ssh/google_compute_known_hosts
DBG enabled ssh private key authentication
DBG enabled ssh agent authentication
DBG ssh agent socket found socket=/run/user/1000/keyring/ssh
DBG connect to remote ssh methods=1 user=ec2-user
DBG could not establish ssh session error="dial tcp 52.59.216.198:22: connect: connection timed out" host=52.59.216.198 insecure=false port=22 provider=ssh
FTL failed to run query error="dial tcp 52.59.216.198:22: connect: connection timed out"

[czunker]

This also fixes #1814 :

cnquery run ssh [email protected] -c "asset{ name title ids }" --verbose                                                                                
! CLI pre-processing encountered an issue error="unknown flag: --verbose"
DBG using provider os with connector ssh
! using builtin provider for os
→ loaded configuration from /etc/opt/mondoo/mondoo.yml using source default
DBG ssh> could not read ssh config error="open /home/christian/.ssh/config: no such file or directory" file=/home/christian/.ssh/config
DBG load ssh known_hosts file file=/home/christian/.ssh/known_hosts
DBG load ssh known_hosts file file=/home/christian/.ssh/google_compute_known_hosts
DBG enabled ssh agent authentication
DBG ssh agent socket found socket=/run/user/1000/keyring/ssh
DBG connect to remote ssh methods=1 user=ec2-user
DBG skip hostkey check the hostkey since the algo is not supported yet
DBG could not establish ssh session error="ssh: handshake failed: ssh: disconnect, reason 2: Too many authentication failures" host=3.123.17.243 insecure=false port=22 provider=ssh
FTL failed to run query error="ssh: handshake failed: ssh: disconnect, reason 2: Too many authentication failures"

And w/o ssh-agent:

cnquery run ssh [email protected] -c "asset{ name title ids }" --verbose                                                                                   
! CLI pre-processing encountered an issue error="unknown flag: --verbose"
DBG using provider os with connector ssh
! using builtin provider for os
→ loaded configuration from /etc/opt/mondoo/mondoo.yml using source default
DBG ssh> could not read ssh config error="open /home/christian/.ssh/config: no such file or directory" file=/home/christian/.ssh/config
DBG load ssh known_hosts file file=/home/christian/.ssh/known_hosts
DBG load ssh known_hosts file file=/home/christian/.ssh/google_compute_known_hosts
DBG enabled ssh agent authentication
DBG could not find valid ssh agent authentication
DBG could not establish ssh session error="no authentication method defined" host=3.123.17.243 insecure=false port=22 provider=ssh
FTL failed to run query error="no authentication method defined"

[czunker]

This fixes also a panic for ssm connect, when connecting against a non-ssm instance:

cnquery run aws ec2 ssm ec2-user@i-08add0bfe5db56c47 --region eu-central-1 -c 'asset{ name title ids platform }'             
! CLI pre-processing encountered an issue error="unknown flag: --region"
→ loaded configuration from /etc/opt/mondoo/mondoo.yml using source default
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x28 pc=0x12265f3]

goroutine 73 [running]:
go.mondoo.com/cnquery/providers/os/connection.(*SshConnection).RunCommand(0x0?, {0x1c90378?, 0x0?})
	/home/christian/workspace/mondoo/github.com/cnquery/providers/os/connection/ssh.go:138 +0x13
go.mondoo.com/cnquery/providers/os/detector.(*OSReleaseDetector).command(0x0?, {0x1c90378?, 0xc000014660?})
	/home/christian/workspace/mondoo/github.com/cnquery/providers/os/detector/os_release.go:27 +0x24
go.mondoo.com/cnquery/providers/os/detector.(*OSReleaseDetector).unames(...)
...