feat: implements public bucket access for write operations

Public buckets support a set of actions on buckets and objects, returning various errors based on the S3 action type and permissions (ACL or policy). The implementation aligns with the table provided in [this gist](https://gist.github.com/niksis02/5919d52d6112537a31c14d9abfa89ac0).

s3api/middlewares/set-defualt-keys.go

@@ -1,37 +0,0 @@
-// Copyright 2023 Versity Software
-// This file is licensed under the Apache License, Version 2.0
-// (the "License"); you may not use this file except in compliance
-// with the License.  You may obtain a copy of the License at
-//
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing,
-// software distributed under the License is distributed on an
-// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-// KIND, either express or implied.  See the License for the
-// specific language governing permissions and limitations
-// under the License.
-
-package middlewares
-
-import (
-	"time"
-
-	"github.com/gofiber/fiber/v2"
-	"github.com/versity/versitygw/auth"
-	"github.com/versity/versitygw/s3api/utils"
-)
-
-func SetDefaultValues(root RootUserConfig, region string) fiber.Handler {
-	return func(ctx *fiber.Ctx) error {
-		// These are necessary for the server access logs
-		utils.ContextKeyRegion.Set(ctx, region)
-		utils.ContextKeyStartTime.Set(ctx, time.Now())
-		utils.ContextKeyRootAccessKey.Set(ctx, root.Access)
-		// Set the account and isRoot to some defulat values, to avoid panics
-		// in case of public buckets
-		utils.ContextKeyAccount.Set(ctx, auth.Account{})
-		utils.ContextKeyIsRoot.Set(ctx, false)
-		return ctx.Next()
-	}
-}