🐛 utils.TrimBytes wrong result if it should return a empty bytes

[fufuok]

Fiber version

v2.27.0

Issue description

follow-up questions: #1774

utils.TrimBytes([]byte(" "), ' ') got []byte(" ") instead of []byte("")

Code snippet

package main_test

import (
	"bytes"
	"testing"

	"github.com/gofiber/fiber/v2/utils"
)

func TestShouldBeEmptyBytes(t *testing.T) {
	res := bytes.Trim([]byte(" "), " ")
	utils.AssertEqual(t, 0, len(res)) // this is right

	res = bytes.Trim([]byte("  "), " ")
	utils.AssertEqual(t, 0, len(res)) // this is right

	res = utils.TrimBytes([]byte(" "), ' ')
	utils.AssertEqual(t, 0, len(res)) // this is wrong, result is 1

	res = utils.TrimBytes([]byte("  "), ' ')
	utils.AssertEqual(t, 0, len(res)) // this is wrong, result is 1

	res = utils.TrimBytes([]byte(""), ' ')
	utils.AssertEqual(t, 0, len(res))
}