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/api/actions/artifactsv4.go

@@ -449,7 +449,7 @@ func (r *artifactV4Routes) getSignedArtifactURL(ctx *ArtifactContext) {
 	respData := GetSignedArtifactURLResponse{}
 
 	if setting.Actions.ArtifactStorage.MinioConfig.ServeDirect {
-		u, err := storage.ActionsArtifacts.URL(artifact.StoragePath, artifact.ArtifactPath)
+		u, err := storage.ActionsArtifacts.URL(artifact.StoragePath, artifact.ArtifactPath, nil)
 		if u != nil && err == nil {
 			respData.SignedUrl = u.String()
 		}