Adds the ability to exit with a non-zero exit code for 'opa exec' by adding the
--fail and --fail-defined flags matching their respective behaviors in 'opa eval':
- Setting the --fail-defined flag allows exit of opa exec with a zero code if all
results are undefined and there are no errors, or a non-zero code in the
event of any defined results and/or errors.
On non-zero exits the error message includes the number of failures/errors
as well as a reference to the --fail-defined flag being set.
- The --fail flag behaves as the inverse of --fail-defined.
Fixes: #5007
Signed-off-by: Byron Lagrone <byron.lagrone@seqster.com>
Byron Lagrone
235ee309da