Update CI to use go 1.18
What does this MR do and why?
go 1.17 is no longer receiving security updates. Update to go 1.18 in preparation for upgrading.
Part of &8843 (closed)
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Stan Hu