Route redirect url encoding

staticwebapp.config.json
```
{
"routes": [
{
"route": "/tiktok",
"redirect": "https://www.tiktok.com/@myuser",
"statusCode": 301
}
}
```

When navigating to `https://myapp.com/tiktok` redirects to `https://www.tiktok.com/%40myuser`

According to [RCF 3986](https://datatracker.ietf.org/doc/html/rfc3986#section-3.3) the @ sign is a valid url component and should not be encoded

Also more generally speaking I agree with what was said in #1007

> the service should not be URL encoding what we enter for redirect values without us explicitly telling it to. In other words, our redirect URLs should function exactly as we have written them.