ApacheModRewriteRule requires leading slash to be explicit

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

seems https://github.com/dotnet/aspnetcore/blob/main/src/Middleware/Rewrite/src/ApacheModRewrite/ApacheModRewriteRule.cs#L24 doesn't use the `AddRewrite()` rule logic to skip the first leading `/` so overall behavior is not httpd mod_rewrite one.

Guess it will need a toggle to mitigate the backward compatibility but can be great to fix it to make it more compatible with httpd.

### Expected Behavior

_No response_

### Steps To Reproduce

_No response_

### Exceptions (if any)

_No response_

### .NET Version

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### Anything else?

_No response_