feat: add remember() to CacheInterface

[datamweb]

Description
The method has already been implemented in BaseHandler and is therefore
available on all built-in cache handlers. Exposing it on the interface
improves IDE support and allows consumers to safely rely on the method
when type-hinting against CacheInterface.

See: #4107 (comment)

Checklist:

• Securely signed commits
• Component(s) with PHPDoc blocks, only if necessary or adds value (without duplication)
• Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[michalsn]

Thank you @datamweb and @paulbalandan

[datamweb]

Thanks everyone for pushing this PR forward.
I was offline for about 15 days due to connectivity limitations, so I couldn’t follow up—sorry about that.
Really appreciate the team for moving it ahead and getting it done.