Add caffeine option for cacheProvider

[murdos]

Overview of the feature request

Caffeine is a new option available for cache since JHipster 6.3.0

Motivation for or Use Case

It should be possible to select this option in JDL

Related issues or PR

https://github.com/jhipster/generator-jhipster/pull/10303

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[SudharakaP]

@murdos : Thanks for adding this; seems I've missed this. 😄