Closes https://github.com/zed-industries/zed/issues/22642
In Zed, Rust's label generators expected the details to come in ` (use
std.foo.Bar)` form, but recently, r-a started to send these details
without the leading whitespace which broke the code generation.
The PR makes LSP results parsing more lenient to work with both details'
forms.
Release Notes:
- Fixed Rust completion labels not showing the imports