Update Go to 1.22

[moskyb]

Description

Updates Golang to 1.22, and makes use of the easy-to-convert features it brings. Most notably:

• Makes use of the new range-over-int technology
  • i used the regex for (a-z) := 0; (.*); \1\+\+ to find, and then for $1 := range $2 to replace. Golang then complained that some of the loop variables weren't being used, so i went through those and manually removed the variables that it was complaining about
• Removes redeclarations of loop variables, as they're now scoped to the body of the loop. hooray!
  • i used the regex (\w+) := \1\n to find, and replaced with an empty string

(this description stolen from buildkite/agent#2631, but i did do exactly the same thing, so ¯\_(ツ)_/¯)

[DrJosh9000]

✨ LGTM

but I think you need to update pipeline.yaml also