Provide ability to set cache size limits and mark entries as permanent

[dolphinsd]

Memory cache implementation should expose existing net core functions to control cache size.

Use case: to make sure host machine does not run out of memory.

See how at https://docs.microsoft.com/en-us/aspnet/core/performance/caching/memory?view=aspnetcore-6.0
and
https://docs.microsoft.com/en-us/aspnet/core/performance/caching/memory?view=aspnetcore-6.0#use-setsize-size-and-sizelimit-to-limit-cache-size

[ismcagdas]

@dolphinsd thanks, we will check this.