Cool things to do once we move to go 1.27

While we shouldn't immediately move to Go 1.27 once it's released to not make the life of our beloved downstream packager, we should keep the following in mind once we do the jump:

• Direct reference to embedded fields in struct literals
• Use of stdlib's uuid package
• Move to jsonv2
• In-memory test server
• Running go fix, as it has a bunch of new niceties

See https://victoriametrics.com/blog/go-1-27/ for inspiration