CI: move grabpl build-frontend from grabpl to grafana (#53073)

* move grabpl build-frontend

pkg/build/frontend/config.go

@@ -0,0 +1,30 @@
+package frontend
+
+import (
+	"github.com/grafana/grafana/pkg/build/config"
+	"github.com/urfave/cli/v2"
+)
+
+const GrafanaDir = "."
+
+func GetConfig(c *cli.Context, version string) (config.Config, config.Edition, error) {
+	cfg := config.Config{
+		NumWorkers:     c.Int("jobs"),
+		GitHubToken:    c.String("github-token"),
+		PackageVersion: version,
+	}
+
+	mode := config.Edition(c.String("edition"))
+
+	if version == "" {
+		buildID := c.String("build-id")
+		var err error
+		version, err = config.GetGrafanaVersion(buildID, GrafanaDir)
+		cfg.PackageVersion = version
+		if err != nil {
+			return config.Config{}, config.EditionOSS, cli.Exit(err.Error(), 1)
+		}
+	}
+
+	return cfg, mode, nil
+}