refactor: replace experimental maps and slices with stdlib (#20679)

The experimental functions are now available in the standard library in
Go 1.23 [1].

[1]: https://go.dev/doc/go1.23#new-unique-package

Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>

cmd/object-api-utils.go

@@ -29,6 +29,7 @@ import (
 	"net/http"
 	"path"
 	"runtime"
+	"slices"
 	"strconv"
 	"strings"
 	"sync"
@@ -52,7 +53,6 @@ import (
 	"github.com/minio/pkg/v3/trie"
 	"github.com/minio/pkg/v3/wildcard"
 	"github.com/valyala/bytebufferpool"
-	"golang.org/x/exp/slices"
 )
 
 const (