Core assignation wired to collatorAssignment

[girazoki]

Removes core-time traces and uses instead collator-assignation as a source of truth to assign cores. Currently the way it works is:

• parachains get the first 0..n-1 cores, where n is the number of parachains served for this session
• parathreads get the rest of the cores until configuration.num_cores

In order to seamlessly test this, I had to add the possibility of registering a parachain and invulnerables (collators) from genesis in the tanssi-registrar. Now you can see this works by running the appropriate zombienet suite.

Important: this only works because

• Parachain block production is not for now in charge of the tanssi-collators (ergo, we only care that the parachain has collators assigned in the runtime, nothing else)
• We are assigning Alice and Bob as invulnerables and these have already registered keys. pallet-session does not allow to register session-keys that are not part of active first validator set on genesis.

Whenever we constrcut the solo-chain aware collator node, this will fail. We will need an alternative solution for being able to inject the collator keys at genesis.

Todos for this PR:

[x] Rust integration tests

[github-actions]

Coverage Report

(master)

@@                                 Coverage Diff                                  @@
##           master   wiring-core-assignation-with-collator-assignment      +/-   ##
====================================================================================
+ Coverage   65.95%                                             66.11%   +0.16%     
  Files         263                                                263              
+ Lines       45208                                              45754     +546     
====================================================================================
+ Hits        29813                                              30246     +433     
+ Misses      15395                                              15508     +113     

Files Changed	Coverage
/primitives/traits/src/lib.rs	82.95% (-1.14%)	🔽
/solo-chains/runtime/starlight/src/genesis_config_presets.rs	23.56% (+2.18%)	🔼
/solo-chains/runtime/starlight/src/lib.rs	22.25% (+2.25%)	🔼
/solo-chains/runtime/starlight/src/tests/common/mod.rs	95.94% (+0.55%)	🔼

Coverage generated Tue Aug 6 09:10:32 UTC 2024