[feature request] Sidecar terminator ignore the exit code of the sidecar container

[zmberg]

What would you like to be added:
OpenKruise job sidecar terminator controller watches and terminates sidecar containers for such job-type Pods when its main containers completed, details: JobSidecarTerminator.

But, the above feature contains certain limitation of "Your sidecar container must respond the SIGTERM signal, and the entrypoint should exit 0 when received this signal." If the exit code of the sidecar container is non-zero, Job will judge the pod failure.

So i hope JobSidecarTerminator can solve the above problem and ensure that the job is completed normally even if the exit code of the sidecar container is non-zero.

[diannaowa]

This is my workaround: #1303

@zmberg PTAL

[zmberg]

/assign @diannaowa