s3: option to disable bucket auto-creation on upload (#10759)

* s3: add option to disable bucket auto-creation on upload

* command: expose -autoCreateBucket in s3, filer, server, and mini

* s3: apply the bucket auto-create policy to directory marker uploads

* s3: validate the bucket name before the auto-create disabled check

* s3: cover the disabled auto-create gate at all three upload entry points

weed/s3api/s3api_server.go

@@ -52,6 +52,7 @@ type S3ApiServerOption struct {
 	BucketsPath               string
 	GrpcDialOption            grpc.DialOption
 	AllowDeleteBucketNotEmpty bool
+	AutoCreateBucket          bool // create the bucket on upload if it does not exist
 	LocalFilerSocket          string
 	DataCenter                string
 	FilerGroup                string