Include upcoming default values for the session timeouts in the deprecation log.

[azasypkin]

Summary

Include upcoming default values for the session timeouts in the deprecation log.

Follow-up for: #106061

[kibanamachine]

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[elasticmachine]

Pinging @elastic/kibana-security (Team:Security)

[legrego]

LGTM! question do you think we should merge into master as well, so that the config_deprecations file is kept in sync between the branches? At some point master will diverge to support 8.0, but it might make maintaining these deprecations easier in the short term if everything is aligned

[azasypkin]

question do you think we should merge into master as well, so that the config_deprecations file is kept in sync between the branches?

I was considering this initially, but the issue is that this deprecation will always be logged in master/8.0 if we keep it (raw session settings will be undefined since we get them before they are validated where we set them to custom defaults), which is confusing and technically not correct. Or what was your idea @legrego ?

[legrego]

question do you think we should merge into master as well, so that the config_deprecations file is kept in sync between the branches?

I was considering this initially, but the issue is that this deprecation will always be logged in master/8.0 if we keep it (raw session settings will be undefined since we get them before they are validated where we set them to custom defaults), which is confusing and technically not correct. Or what was your idea @legrego ?

Ah good call, I forgot about that the deprecations run beforehand. In that case, I'm happy to leave this as-is, and only merge into 7.x. Thanks!