update go version to go1.19

[charleenfei]

Summary

Note dependent on SDK updating also

requested by the cosmostation team @carameleon:

hi team.
GOMEMLIMIT introduced with revised memory model in Go1.19.
though gaiad wasn't required many memory at the moment, I think it will be helpful for node operators to provision and manage their infrastructure.
also I think it would be great if it is introduced cosmos and cosmos ecosystem chains over all.
thanks!

https://github.com/golang/go/issues/48409
https://tip.golang.org/doc/go1.19
https://weaviate.io/blog/2022/08/GOMEMLIMIT-a-Game-Changer-for-High-Memory-Applications.html

Problem Definition

Proposal

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