feat(launch): config file for genesis

[aljo242]

Closes #395

What does this PR do?

Includes a refactor of MsgCreateChain and other associated functions to take InitialGenesis as argument instead of genesisURL and genesisHash.

[codecov]

Codecov Report

Merging #958 (c8fd979) into develop (b3f1d20) will decrease coverage by 0.01%.
The diff coverage is 8.07%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #958      +/-   ##
===========================================
- Coverage    10.67%   10.65%   -0.02%     
===========================================
  Files          272      272              
  Lines        65062    65235     +173     
===========================================
+ Hits          6946     6952       +6     
- Misses       57953    58119     +166     
- Partials       163      164       +1     

Impacted Files	Coverage Δ
x/launch/types/tx.pb.go	0.53% <0.00%> (+<0.01%)	⬆️
x/launch/types/chain.pb.go	1.37% <0.48%> (-0.14%)	⬇️
x/campaign/keeper/msg_initialize_mainnet.go	94.54% <100.00%> (+0.20%)	⬆️
x/launch/keeper/chain.go	97.36% <100.00%> (-0.12%)	⬇️
x/launch/keeper/msg_create_chain.go	91.66% <100.00%> (-0.23%)	⬇️
x/launch/types/initial_genesis.go	95.34% <100.00%> (+1.80%)	⬆️
x/launch/types/msg_create_chain.go	72.09% <100.00%> (-0.64%)	⬇️
x/campaign/simulation/store.go	83.10% <0.00%> (-1.36%)	⬇️