Public Methods on `org.logstash.ackedqueue.Queue` Should Throw `IllegalStateException` before `open` or `recover` was Called on the Queue

It's in the title. Before `open` was called on a `Queue` the object is not in a usable state.

`write`ing to it will cause an NPE to be thrown.
The return of `org.logstash.ackedqueue.Queue#getPersistedByteSize` will be `0` even when this is not necessarily true. (In hindsight #7023 ) not a good approach.

A random issue where this actually came through: https://github.com/elastic/logstash/issues/7022.
Also, note that this should be fixed before #6998 to ensure the stability of the process of determining necessary free disk space from the existing persisted data.

Start with org.logstash.ackedqueue.Queue and inspect its public methods, especially write and getPersistedByteSize, along with the open and recover lifecycle. Reproduce calls made before initialization and verify that every applicable public method consistently throws IllegalStateException instead of exposing invalid state or an NPE.

Written by the indexing model from the issue text.