[release-16.0] Upgrade the Golang version to go1.20.8#13932

frouioui merged 3 commits intorelease-16.0vitessio/vitess:release-16.0from

upgrade-go-to-1.20.8-on-release-16.0vitessio/vitess:upgrade-go-to-1.20.8-on-release-16.0Copy head branch name to clipboard