Generated libraries with the same name fail to link

If Rust tries to link against two generated libraries with the same name, there will be the error:
```
ld.lld: error: undefined symbol: app_function
>>> referenced by app.1555d9328bfdc04c-cgu.0
>>> bazel-out/k8-fastbuild/bin/app.app.1555d9328bfdc04c-cgu.0.rcgu.o:(app::main::h288a2b8d569cac4d)
collect2: error: ld returned 1 exit status
```

Possible breaking change introduced here: https://github.com/bazelbuild/rules_rust/pull/3647

It's likely the `depsets` before allowed same name binaries to exist due to a nested structure.

Example which shows the breaking change along with workarounds:
https://github.com/finn-ball/rules_rust_binary_clash
[rules_rust_binary_clash-main.zip](https://github.com/user-attachments/files/29808680/rules_rust_binary_clash-main.zip)