refactor(surfer): move gcloud config and command files to package surfer (#2832)

Move code related to generating gcloud command YAML from
`internal/sidekick/config/gcloudyaml` and `internal/sidekick/gcloud`
into `internal/surfer` to consolidate gcloud logic into one location.

Pure code in motion.

For #2375

Author: julieqiu

internal/sidekick/config/config.go

@@ -22,8 +22,8 @@ import (
 	"os"
 	"path"
 
-	"github.com/googleapis/librarian/internal/sidekick/config/gcloudyaml"
 	"github.com/googleapis/librarian/internal/sidekick/license"
+	"github.com/googleapis/librarian/internal/surfer/gcloudyaml"
 	toml "github.com/pelletier/go-toml/v2"
 )
 

internal/sidekick/sidekick/refresh.go

@@ -22,10 +22,10 @@ import (
 	"github.com/googleapis/librarian/internal/sidekick/codec_sample"
 	"github.com/googleapis/librarian/internal/sidekick/config"
 	"github.com/googleapis/librarian/internal/sidekick/dart"
-	"github.com/googleapis/librarian/internal/sidekick/gcloud"
 	"github.com/googleapis/librarian/internal/sidekick/parser"
 	"github.com/googleapis/librarian/internal/sidekick/rust"
 	"github.com/googleapis/librarian/internal/sidekick/rust_prost"
+	"github.com/googleapis/librarian/internal/surfer/gcloud"
 )
 
 func init() {

internal/sidekick/gcloud/command.go renamed to internal/surfer/gcloud/command.go

@@ -15,7 +15,7 @@
 // Package gcloud provides utilities for generating gcloud command configurations and related types.
 package gcloud
 
-import "github.com/googleapis/librarian/internal/sidekick/config/gcloudyaml"
+import "github.com/googleapis/librarian/internal/surfer/gcloudyaml"
 
 // Command is a single gcloud command.
 type Command struct {