Do not pass data: fetch requests to the native http request handler

[frederikbosch]

For all sorts of reasons, a fetch request of data URI might be executed.

fetch(new URL('data:text/css,body{background:red}'))

At the moment these requests are forwarded to the native request, causing crashes like the one that PR #8304 is trying to solve. With this PR, data: requests will not be forwarded anymore to native request layer.

Just to explain why, in my app, I am fetching a DATA CSS Uri.

• in my app the following code fetch(new URL('./file.css'))
• is compiled by Vite as fetch(new URL('data:text/css,body{background:red}'))
• so, while I am not intentionally fetching a data URI, it is compiled as such, because the resource is so small that Vite modifies it to an inline asset

[jcesarmobile]

Thanks for the PR, but while this change solves your issue, it doesn't address the real problem.
The real problem is that we are not handling URL objects on fetch calls.
I've addressed it here #8386

As I commented on #8304, I had already tried a fetch call with a data:// url and it was working fine, because I passed it as string, since now you have shared that you were using an URL object, I tried and verified that it causes the crash.

[frederikbosch]

Thanks @jcesarmobile