Coretime Zombienet Test

[eskimor]

Setup a Zombienet with coretime parachain and make it send an assignment over to the relay chain. See it getting served. (Second parachain)

Network must be bootstrapped - coretime chain must have a core on the relay chain pre-configured.

Tasks

• Fix Westend (migrations)
• Fix Rococo - remove WeightInfo
• Make CI pass
• Add dummy WeightInfo for exposed assign_core call
• Add configurations:
  • No legacy cores
  • Two bulk cores: one idling, one for coretime itself (pre-assigned) (currently we recycled the on_demand_cores config - so set this to 2, to get 2 core time cores)

Then have Coretime chain assign another para to the unoccupied core and see the other parachain starting to produce blocks: Tada! First basic test passed and we go from there.

Later Phase

Next up, would likely be core time chain actually manipulating the core count, after we implemented request_core_count.

If we move system chains over, we should test that this works smoothly. Core number will likely change, which should not matter, but worth testing.

[eskimor]

We need to provide matching initial configurations for relay chain and core time chain.

[kamilsa]

@eskimor am I right that there no available coretime zombienet tests? We were curious to run them with Kagome

[bkchr]

There is one: #2867

I think we can also close this ticket now.