remove daysSinceLastScan as it is redundant with certifier interval

[pxp928]

Description of the PR

fixes #2077

PR Checklist

• All commits have a Developer Certificate of Origin (DCO) -- they are generated using -s flag to git commit.
• All new changes are covered by tests
• If GraphQL schema is changed, make generate has been run
• If GraphQL schema is changed, GraphQL client updates/additions have been made
• If OpenAPI spec is changed, make generate has been run
• If ent schema is changed, make generate has been run
• If collectsub protobuf has been changed, make proto has been run
• All CI checks are passing (tests and formatting)
• All dependent PRs have already been merged

[mihaimaruseac]

I think this makes sense, but leaving just a comment so that others get a chance to look at it too

[pxp928]

Looks like I need to fix the e2e test here

[pxp928]

should be fixed now