Ability to disable waypoint exec to mitigate security risk.

[dzrtc]

Is your feature request related to a problem? Please describe.
The existence of waypoint exec creates a security vulnerability in my environment, but the other capabilities of the entrypoint are nice.

Describe the solution you'd like
I'd like to be able to disable support for waypoint exec without disabling the Waypoint entrypoint entirely.

Describe alternatives you've considered
Disabling the Waypoint entrypoint is the only alternative, but it seems like overkill considering that waypoint logs is pretty useful. On the other hand, there are plenty of service mesh sidecar proxy solutions that might, overall, be a better fit for monitoring instances.

Explain any additional use-cases

Additional context

[mitchellh]

Agreed, this is something we’ve wanted to do.