Port `IntAllocator` from `rabbitmq-java-client`

[lukebakken]

Is your feature request related to a problem? Please describe.

https://github.com/rabbitmq/rabbitmq-java-client/blob/main/src/main/java/com/rabbitmq/utility/IntAllocator.java

We should be able to do pretty much the same thing with BitArray, or OpenBitSet

Describe the solution you'd like

Improve IntAllocator. Related to this issue: #1784

Describe alternatives you've considered

N/A

Additional context

• Intermittent deadlock when closing a channel using CloseAsync in 7.x #1751 (comment)
• Bug in IntervalList causes leak in locks. #1784