* AB40660 - untangle the preview cookie from the auth cookie
* Clean up
* Allow anonymous to end preview sessions
* Some refinements
* update OpenApi.json
* Fix enter preview test
* correct tests to match new expectations of the preview cookie
* sync preview tests with correct expectations of access level
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Co-authored-by: Sven Geusens <sge@umbraco.dk>
Co-authored-by: Jacob Overgaard <752371+iOvergaard@users.noreply.github.com>
