tests: Do not allow forced type asserts (#20905)

internal/bpool/pool.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2015-2025 MinIO, Inc.
+//
+// This file is part of MinIO Object Storage stack
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package bpool
+
+import "sync"
+
+// Pool is a single type sync.Pool with a few extra properties:
+// If New is not set Get may return the zero value of T.
+type Pool[T any] struct {
+	New func() T
+	p   sync.Pool
+}
+
+// Get will retuen a new T
+func (p *Pool[T]) Get() T {
+	v, ok := p.p.Get().(T)
+	if ok {
+		return v
+	}
+	if p.New == nil {
+		var t T
+		return t
+	}
+	return p.New()
+}
+
+// Put a used T.
+func (p *Pool[T]) Put(t T) {
+	p.p.Put(t)
+}