feat: make RequestQueueV2 the default queue

[vladfrangu]

Closes #2388

[drobnikj]

Just note this, we will update docs and create separate tutorial to using rqv2. Let's wait to release this to have it ready.

[B4nan]

@drobnikj I'd be up for merging this now, so we can test it better (and we'll hold the release till the docs are ready).