Retention period edge case

[jo-pol]

Why we need this PR:

When you select a retention period the current date + one year is offered as an option but not allowed. The error message however says it is allowed.

What this PR does:

• java validation subtracts one day from the minimal date to turn isBefore(...) into <= ...
• end date: no longer checked nor reported

Which issue(s) this PR closes:

• Closes #

Special notes for your reviewer:

Suggestions on how to test this:

WEB-UI:

• Add a file to a draft dataset, save the changes but do not publish.
• Select retention period from edit files.
• Pick edge cases from the calendar, type invalid edge case manually.

API:

• try edge cases with https://guides.dataverse.org/en/latest/api/native-api.html#set-a-retention-period-on-files-in-a-dataset

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

Messages will now look like:

With a date over a thousand years in the future, you will no longer get the web-ui message:
datasetForm:fileRetentionDate: Validation Error: Value must be between 2027-06-01 and 3026-06-01.

Is there a release notes update needed for this change?:

Additional documentation: