Add GitHub plan as an artifact

[venkatamutyala]

Given GitHub comment limitations it would be helpful to have the plan as an artifact instead of a comment. This way we can easily see the full results.

[dflook]

Hi, the full plan is always in the workflow log and linked to from the comment.

[venkatamutyala]

@dflook Sorry, i didn't add enough context. I use your actions to plan/apply and as part of that process, before the apply, I use another action (manual-approval) to review the live workflow logs and then tell it to apply or stop the workflow. Depending on the number of resources being updated the workflow logs when being view live get cut off, so then I have to stop/cancel the workflow, review the logs and then trigger it again. If the logs were uploaded as an artifact I think it would help others in my situation