Trying to upgrade non-existing instance does not return non-zero exit code - Closes #3928

[ManuGowda]

What was the problem?

Trying to upgrade non-existing instance does not return non-zero exit code

How did I solve it?

Returning non-zero code for non-existing instance

How to manually test it?

lisk core:status idontexist
lisk core:upgrade meneither

Review checklist

• The PR resolves Trying to upgrade non-existing instance does not return non-zero exit code #3928
• All new code is covered with unit tests
• Relevant integration / functional tests are added
• Commit messages follow the commit guidelines
• Documentation has been added/updated

[fchavant]

lisk core:upgrade instance_that_does_not_exist nows exits with code 2