Encrypted Saved Objects can be partially updated and cause AAD issues

[mikecote]

The alerting team has been caught a few times updating encrypted attributes while forgetting to provide all the values for AAD. This issue would be to enhance this developer experience when such scenario is encountered.

The alerting team is still planning to leverage partial updates to update attributes excluded from AAD (see: #76830).

Original description

Fix ESO to not do partial update. See: https://github.com//pull/40694#pullrequestreview-261268183

[elasticmachine]

Pinging @elastic/kibana-stack-services (Team:Stack Services)

[mikecote]

@pmuellr @gmmorris this issue is pretty old, we can probably close this and mark as similar to #71995?

[gmmorris]

hmm not sure... tbh this feels like a Security team issue, not an Alerting one 🤔
@legrego ?

[legrego]

Yeah let's leave open for now. I'll re-label as a security team issue