dont send server address in a-href

[light-and-ray]

Description

Gradio sets these tags automatically when generates hyperlinks from markdown rel="noopener noreferrer" I've added them into webui's html

You can see users' non-local server addresses (e.g. --share or their hosting) in github's repo statistics for example, when they go to the repo via Extensions tab. Other sites can see them too. This PR fixes this

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

[w-e-w]

I think it might be possible to just set Referrer-Policy header no-referrer
to automatically apply to the entire web page
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy

[w-e-w]

• try this no-referrer #15641

[light-and-ray]

I thinks it's good to merge both

[w-e-w]

I thinks it's good to merge both

in my opinion if the global one works then just the global one is better
less clutter the the code