Think about validity of using extendedSessionsEnabled parameter for enabling caching

[sebastianburckhardt]

In Netherite the extendedSessionsEnabled parameter is used for enabling the caching of execution cursors. This improves performance when executing work items for instances that were previously active.

It appears that this parameter is however not available for out-of-proc situations (see Azure/azure-functions-durable-js#98). Thus it may be necessary to use a different parameter.

[sebastianburckhardt]

I think I should change this parameter to a different name since it does not actually use the extended session mechanism, but a different way to cache intermediate states.