Create a Diagnostics implementation that keeps the last queueSize emitted events in a queue.

Useful for testing, or any other case where you don't want to risk high memory usage due to a slow diagnostics implementation.

For example, for a Diagnostics that keeps the last 100 consumer DiagnosticEvents use:

import zio.kafka.consumer.diagnostics.{DiagnosticEvent => ConsumerDiagnosticEvent}
for {
  diagnostics <- SlidingDiagnostics.make[ConsumerDiagnosticEvent](100)
  ... use diagnostics
  events <- diagnostics.queue.takeAll
} yield {
  assert(events.length == 100)
}