Implement a Backoff Mechanism which increases the time between remediations created for the same node.

This topic was re-discussed in context of SBR as it is a crucial feature for SBR which needs to remove the remediation as part of it's normal workflow even if the node isn't healthy.

The context below is taken from SBR Design doc

Proposal: If the node remains unhealthy after the grace period, and a new remediation is created, we should increase the time before removing that new remediation (Exponential Backoff).

• Decision: We will address this issue post GA, it would likely be an NHC enhancement but we need to think about how manage the configuration as it is a feature that we’d likely want to be mandatory in SBR but not necessarily so in other remediatiors