Scuemata: Simplify grafana-cli cue validation tests (#33913)

* Simplify tests

* Make PanelFieldConfig optional in missing panel scenario

pkg/cmd/grafana-cli/commands/scuemata_validation_command_test.go

@@ -1,8 +1,6 @@
 package commands
 
 import (
-	"embed"
-	"io/fs"
 	"os"
 	"path/filepath"
 	"testing"
@@ -12,17 +10,13 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-//go:embed testdata/public/*/*.cue testdata/public/*/plugin.json
-var base embed.FS
-var pluginSchema, _ = fs.Sub(base, "testdata/public")
-
 func TestValidateScuemataBasics(t *testing.T) {
 	t.Run("Testing scuemata validity with valid cue schemas", func(t *testing.T) {
 		tempDir := os.DirFS(filepath.Join("testdata", "valid_scuemata"))
 
 		var baseLoadPaths = load.BaseLoadPaths{
 			BaseCueFS:       tempDir,
-			DistPluginCueFS: pluginSchema,
+			DistPluginCueFS: load.GetDefaultLoadPaths().DistPluginCueFS,
 		}
 
 		err := validate(baseLoadPaths, load.BaseDashboardFamily)
@@ -37,7 +31,7 @@ func TestValidateScuemataBasics(t *testing.T) {
 
 		var baseLoadPaths = load.BaseLoadPaths{
 			BaseCueFS:       tempDir,
-			DistPluginCueFS: pluginSchema,
+			DistPluginCueFS: load.GetDefaultLoadPaths().DistPluginCueFS,
 		}
 
 		err := validate(baseLoadPaths, load.BaseDashboardFamily)
@@ -49,7 +43,7 @@ func TestValidateScuemataBasics(t *testing.T) {
 
 		var baseLoadPaths = load.BaseLoadPaths{
 			BaseCueFS:       tempDir,
-			DistPluginCueFS: pluginSchema,
+			DistPluginCueFS: load.GetDefaultLoadPaths().DistPluginCueFS,
 		}
 
 		err := validate(baseLoadPaths, load.BaseDashboardFamily)