Auto merge of #129670 - est31:cfg_attr_crate_type_name_error, r=Urgau

Make deprecated_cfg_attr_crate_type_name a hard error

Turns the forward compatibility lint added by #83744 into a hard error, so now, while the `#![crate_name]` and `#![crate_type]` attributes are still allowed in raw form, they are now forbidden to be nested inside a `#![cfg_attr()]` attribute.

The following will now be an error:

```Rust
#![cfg_attr(foo, crate_name = "foobar")]
#![cfg_attr(foo, crate_type = "bin")]
```

This code will continue working and is not deprecated:

```Rust
#![crate_name = "foobar"]
#![crate_type = "lib"]
```

The reasoning for this is explained in #83744: it allows us to not have to cfg-expand in order to determine the crate's type and name.

As of filing the PR, exactly two years have passed since #99784 has been merged, which has turned the lint's default warning level into an error, so there has been ample time to move off the now-forbidden syntax.

cc #91632 - tracking issue for the lint

0 files changed, 0 insertions, 0 deletions