Feature Request: use go-version-file: for go version in CI

[timvaillancourt]

Feature Description

Use go-version-file: go.mod to find the go version in .github/workflows, when the go version is equal to what is in go.mod

TL;DR: go-version-file: go.mod uses go line from go.mod to get a go version. We already have CI scripts ensuring that version is consistent with go.mod, so there should be little risk to this change

This will make it a bit easier to maintain the repo, and for the fork I maintain, it will make it easier to merge patch releases onto our in-house release - the main conflicts are go-version: updates

Use Case(s)

Maintainers of the Vitess repo or forks