Require light clients to set client and consensus states as necessary in the Initialize function

[colin-axner]

Summary

The majority of functions in 02-client must set their own client and consensus states when updating state. The initialization function should do the same.

Proposal

• Remove these lines of code
• Add setting of client state to solo machine (note, the consensus state does not need to be set separately)
• Add setting of client and consensus states in tendermint similar to how we set the metadata
• update migration documentation
• update client state docs added in Adding docs for client state interface #2886
• update initialize godoc

---

For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate contributors tagged/assigned