Fix missing signature key error when pulling Docker images with SERVE_DIRECT enabled (#32365) (#32397)

Backport #32365

Fix #28121

I did some tests and found that the `missing signature key` error is
caused by an incorrect `Content-Type` header. Gitea correctly sets the
`Content-Type` header when serving files.


https://github.com/go-gitea/gitea/blob/348d1d0f322ca57c459acd902f54821d687ca804/routers/api/packages/container/container.go#L712-L717
However, when `SERVE_DIRECT` is enabled, the `Content-Type` header may
be set to an incorrect value by the storage service. To fix this issue,
we can use query parameters to override response header values.

https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetObject.html <img
width="600px"

src="https://github.com/user-attachments/assets/f2ff90f0-f1df-46f9-9680-b8120222c555"
/>

In this PR, I introduced a new parameter to the `URL` method to support
additional parameters.

```
URL(path, name string, reqParams url.Values) (*url.URL, error)
```

routers/web/base.go

@@ -39,7 +39,7 @@ func storageHandler(storageSetting *setting.Storage, prefix string, objStore sto
 			rPath := strings.TrimPrefix(req.URL.Path, "/"+prefix+"/")
 			rPath = util.PathJoinRelX(rPath)
 
-			u, err := objStore.URL(rPath, path.Base(rPath))
+			u, err := objStore.URL(rPath, path.Base(rPath), nil)
 			if err != nil {
 				if os.IsNotExist(err) || errors.Is(err, os.ErrNotExist) {
 					log.Warn("Unable to find %s %s", prefix, rPath)