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

agent/reconnectingpty/buffered.go

@@ -14,7 +14,7 @@ import (
 
 	"cdr.dev/slog"
 
-	"github.com/coder/coder/pty"
+	"github.com/coder/coder/v2/pty"
 )
 
 // bufferedReconnectingPTY provides a reconnectable PTY by using a ring buffer to store

agent/reconnectingpty/reconnectingpty.go

@@ -15,8 +15,8 @@ import (
 
 	"cdr.dev/slog"
 
-	"github.com/coder/coder/codersdk"
-	"github.com/coder/coder/pty"
+	"github.com/coder/coder/v2/codersdk"
+	"github.com/coder/coder/v2/pty"
 )
 
 // attachTimeout is the initial timeout for attaching and will probably be far

agent/reconnectingpty/screen.go

@@ -20,7 +20,7 @@ import (
 	"golang.org/x/xerrors"
 
 	"cdr.dev/slog"
-	"github.com/coder/coder/pty"
+	"github.com/coder/coder/v2/pty"
 )
 
 // screenReconnectingPTY provides a reconnectable PTY via `screen`.