Use go run for tool dependencies, require go 1.17 (#18874)

This ensures the tools only run in the versions we've tested and it also
does not polute PATH with those tools so they are truly isolated. This
syntax of `go run` requires go 1.17, so the minimum version is set
accordingly.

Fixes: https://github.com/go-gitea/gitea/issues/18867

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

go.mod

@@ -1,6 +1,6 @@
 module code.gitea.io/gitea
 
-go 1.16
+go 1.17
 
 require (
 	code.gitea.io/gitea-vet v0.2.2-0.20220122151748-48ebc902541b