feat: bump Go version to 1.17

[jaybxyz]

Summary

There are some security fixes in go v1.16.x.

Tasks

• Bump Go version to 1.17

References

• Go 1.17.1 and 1.16.8 are released!
• Go Release History
• feat: bump Go version to 1.17
• gaia v6.0.0-rc2

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[dongsam]

The issue will proceed when the recommended Golang version of the cosmos-sdk version used by the module becomes 1.17.