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

cli/clibase/cmd.go

@@ -15,7 +15,7 @@ import (
 	"golang.org/x/xerrors"
 	"gopkg.in/yaml.v3"
 
-	"github.com/coder/coder/coderd/util/slice"
+	"github.com/coder/coder/v2/coderd/util/slice"
 )
 
 // Cmd describes an executable command.

cli/clibase/cmd_test.go

@@ -11,7 +11,7 @@ import (
 	"github.com/stretchr/testify/require"
 	"golang.org/x/xerrors"
 
-	"github.com/coder/coder/cli/clibase"
+	"github.com/coder/coder/v2/cli/clibase"
 )
 
 // ioBufs is the standard input, output, and error for a command.

cli/clibase/env_test.go

@@ -4,7 +4,7 @@ import (
 	"reflect"
 	"testing"
 
-	"github.com/coder/coder/cli/clibase"
+	"github.com/coder/coder/v2/cli/clibase"
 )
 
 func TestFilterNamePrefix(t *testing.T) {

cli/clibase/option_test.go

@@ -5,7 +5,7 @@ import (
 
 	"github.com/stretchr/testify/require"
 
-	"github.com/coder/coder/cli/clibase"
+	"github.com/coder/coder/v2/cli/clibase"
 )
 
 func TestOptionSet_ParseFlags(t *testing.T) {

cli/clibase/yaml_test.go

@@ -8,7 +8,7 @@ import (
 	"golang.org/x/exp/slices"
 	"gopkg.in/yaml.v3"
 
-	"github.com/coder/coder/cli/clibase"
+	"github.com/coder/coder/v2/cli/clibase"
 )
 
 func TestOptionSet_YAML(t *testing.T) {