[POC] Spawn embeded Container chain node on data preservers assignment

[nanocryk]

Implements the logic to detect assignments and spawn emebed container chain service corresponding to assignment.

This is a proof of concept and will need further work in later PRs:

• this is only implemented in simple container chain node for now. Code in command.rs should be refactored out in a separate crate to be used by frontier container, which should support customizing the RPC (to support frontier RPC).
• only the spawning of the first assignment is tested. Additional work may be required to properly react to unassignment and re-assignment.

Blocked by moondance-labs/dancekit#32 which adds an OrchestratorChainInterface function.

[github-actions]

Coverage Report

(master)

@@                        Coverage Diff                        @@
##           master   jeremy-spawn-cc-on-assignment      +/-   ##
=================================================================
- Coverage   67.55%                          67.48%   -0.07%     
+ Files         262                             264       +2     
+ Lines       47490                           47895     +405     
=================================================================
+ Hits        32080                           32321     +241     
+ Misses      15410                           15574     +164     

Files Changed	Coverage
/client/service-container-chain/src/spawner.rs	44.66% (-0.27%)	🔽
/container-chains/nodes/simple/src/cli.rs	72.73% (-5.84%)	🔽
/container-chains/nodes/simple/src/command.rs	24.01% (-2.21%)	🔽
/node/src/service.rs	22.90% (-0.72%)	🔽
/runtime/dancebox/src/lib.rs	88.60% (-0.14%)	🔽
/runtime/flashbox/src/lib.rs	45.53% (-0.97%)	🔽

Coverage generated Fri Sep 6 07:31:02 UTC 2024

[tmpolaczyk]

Thank you! Don't forget to merge back master again