refactor: use maps.Copy for merging maps in tests

Replace manual for-range loops that copied map entries with `maps.Copy` in test files. Added the "maps" import to as needed to simplify map merging and improve readability.

Signed-off-by: Ryan Johnson <ryan@tenthirtyam.org>

Author: tenthirtyam

builder/vmware/iso/builder_test.go

@@ -6,6 +6,7 @@ package iso
 
 import (
 	"fmt"
+	"maps"
 	"os"
 	"path/filepath"
 	"reflect"
@@ -595,9 +596,7 @@ func TestBuilderPrepare_ToolsMode(t *testing.T) {
 	for _, tc := range testCases {
 		t.Run(tc.name, func(t *testing.T) {
 			config := testConfig()
-			for k, v := range tc.config {
-				config[k] = v
-			}
+			maps.Copy(config, tc.config)
 
 			var b Builder
 			_, warns, err := b.Prepare(config)

builder/vmware/iso/step_create_vmx_test.go

@@ -10,6 +10,7 @@ import (
 	"errors"
 	"fmt"
 	"io"
+	"maps"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -85,9 +86,7 @@ func RenderConfig(builderConfig map[string]interface{}, provisionerConfig map[st
 		},
 	}
 	// apply special builder overrides
-	for k, v := range builderConfig {
-		t["builders"][0][k] = v
-	}
+	maps.Copy(t["builders"][0], builderConfig)
 	// Apply special provisioner overrides
 	for k, v := range provisionerConfig {
 		t["provisioners"][0][k] = v