rabbitmq_management: Fix preference cookie expiry to respect session timeout (backport #15814)

[mergify]

Proposed Changes

Fixes an issue: When a user expands or collapses a page section, or adds/removes columns from a table such as the queues table, the management UI persists that preference in a cookie. The cookie was mistakenly set with a one-year expiry, overriding any configured session timeout or the default session timeout.

As a result, a session would remain valid for a full year, meaning the user would not be prompted to log in again on the same domain for that duration.

Thanks @mkuratczyk for reporting this issue.

Types of Changes

What types of changes does your code introduce to this project?
Put an x in the boxes that apply

• Bug fix (non-breaking change which fixes issue #NNNN)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause an observable behavior change in existing systems)
• Documentation improvements (corrections, new content, etc)
• Cosmetic change (whitespace, formatting, etc)
• Build system and/or CI

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This is an automatic backport of pull request #15814 done by [Mergify](https://mergify.com).