[release-18.0] Upgrade the Golang version to go1.21.3#14230

frouioui merged 2 commits intorelease-18.0vitessio/vitess:release-18.0from

upgrade-go-to-1.21.3-on-release-18.0vitessio/vitess:upgrade-go-to-1.21.3-on-release-18.0Copy head branch name to clipboard