chore: add /v2 to import module path (#9072)

* chore: add /v2 to import module path

go mod requires semantic versioning with versions greater than 1.x

This was a mechanical update by running:
```
go install github.com/marwan-at-work/mod/cmd/mod@latest
mod upgrade
```

Migrate generated files to import /v2

* Fix gen

cmd/coder/main.go

@@ -3,7 +3,7 @@ package main
 import (
 	_ "time/tzdata"
 
-	"github.com/coder/coder/cli"
+	"github.com/coder/coder/v2/cli"
 )
 
 func main() {