override exit codes about fdk-go

[rdallman]

what action should be taken when a user does attempt to exit with one of these codes? exit code 1 is extremely popular to exit with (per the linked table), what is the benefit of blocking this? this smells like adding to the surface area of the container contract (ie agent can expect certain behavior from container), need to flesh this out fully to decide on or we'll start leaking stuff like this.

[skinowski]

We should definitely map out the details on this as conflicts such as OOM exit code is not acceptable. If FDK surface area has to grow to support this then it should.

[skinowski]

closing this, as we think/agree this is outside of FDK scope at this time.