fix minio storage iterator path (#24691)

minio storage iterator shows different behavior with local fs iterator.

in local fs storage:

``` go
s.IterateObjects("prefix", func(path,obj)
     println(path) // show "prefix/xxx.file"
})
```

in minio storage:

```go
s.IterateObjects("prefix", func(path,obj)
     println(path) // show "xxx.file"
})
```

I think local fs is correct, minio use wrong `basePath` to trim storage
path prefix.

---------

Co-authored-by: Giteabot <teabot@gitea.io>

modules/storage/local_test.go

@@ -4,8 +4,6 @@
 package storage
 
 import (
-	"bytes"
-	"context"
 	"os"
 	"path/filepath"
 	"testing"
@@ -57,38 +55,5 @@ func TestBuildLocalPath(t *testing.T) {
 
 func TestLocalStorageIterator(t *testing.T) {
 	dir := filepath.Join(os.TempDir(), "TestLocalStorageIteratorTestDir")
-	l, err := NewLocalStorage(context.Background(), LocalStorageConfig{Path: dir})
-	assert.NoError(t, err)
-
-	testFiles := [][]string{
-		{"a/1.txt", "a1"},
-		{"/a/1.txt", "aa1"}, // same as above, but with leading slash that will be trim
-		{"b/1.txt", "b1"},
-		{"b/2.txt", "b2"},
-		{"b/3.txt", "b3"},
-		{"b/x 4.txt", "bx4"},
-	}
-	for _, f := range testFiles {
-		_, err = l.Save(f[0], bytes.NewBufferString(f[1]), -1)
-		assert.NoError(t, err)
-	}
-
-	expectedList := map[string][]string{
-		"a":           {"a/1.txt"},
-		"b":           {"b/1.txt", "b/2.txt", "b/3.txt", "b/x 4.txt"},
-		"":            {"a/1.txt", "b/1.txt", "b/2.txt", "b/3.txt", "b/x 4.txt"},
-		"/":           {"a/1.txt", "b/1.txt", "b/2.txt", "b/3.txt", "b/x 4.txt"},
-		"a/b/../../a": {"a/1.txt"},
-	}
-	for dir, expected := range expectedList {
-		count := 0
-		err = l.IterateObjects(dir, func(path string, f Object) error {
-			defer f.Close()
-			assert.Contains(t, expected, path)
-			count++
-			return nil
-		})
-		assert.NoError(t, err)
-		assert.Len(t, expected, count)
-	}
+	testStorageIterator(t, string(LocalStorageType), LocalStorageConfig{Path: dir})
 }