Bazel fetch on nuget_repo no longer works post bazel 7.2.0

Hi,

I'm trying to use this with bazel 8 and it appears as if there's some compat issues

If I upgrade the bazel version used in `e2e/net8.0` and then run bazel fetch for the paket deps I get the following snippet from a much larger output

Log output

```
ERROR: /private/var/tmp/_bazel_adam/ecda83633f5cd2436ab4868e2f1f2ac2/external/+main_extension+paket.main/newtonsoft.json/13.0.3/BUILD.bazel:5:15: configurable attribute "deps" in @@+main_extension+paket.main//newtonsoft.json/13.0.3:13.0.3 doesn't match this configuration. Would a default condition help?

Conditions checked:
@@rules_dotnet+//dotnet:tfm_net11
@@rules_dotnet+//dotnet:tfm_net20
@@rules_dotnet+//dotnet:tfm_net30
@@rules_dotnet+//dotnet:tfm_net35
@@rules_dotnet+//dotnet:tfm_net40
@@rules_dotnet+//dotnet:tfm_net403
@@rules_dotnet+//dotnet:tfm_net45
@@rules_dotnet+//dotnet:tfm_net451
@@rules_dotnet+//dotnet:tfm_net452
@@rules_dotnet+//dotnet:tfm_net46
@@rules_dotnet+//dotnet:tfm_net461
@@rules_dotnet+//dotnet:tfm_net462
@@rules_dotnet+//dotnet:tfm_net47
@@rules_dotnet+//dotnet:tfm_net471
@@rules_dotnet+//dotnet:tfm_net472
@@rules_dotnet+//dotnet:tfm_net48
@@rules_dotnet+//dotnet:tfm_net5.0
@@rules_dotnet+//dotnet:tfm_net6.0
@@rules_dotnet+//dotnet:tfm_net7.0
@@rules_dotnet+//dotnet:tfm_net8.0
@@rules_dotnet+//dotnet:tfm_net9.0
@@rules_dotnet+//dotnet:tfm_netcoreapp1.0
@@rules_dotnet+//dotnet:tfm_netcoreapp1.1
@@rules_dotnet+//dotnet:tfm_netcoreapp2.0
@@rules_dotnet+//dotnet:tfm_netcoreapp2.1
@@rules_dotnet+//dotnet:tfm_netcoreapp2.2
@@rules_dotnet+//dotnet:tfm_netcoreapp3.0
@@rules_dotnet+//dotnet:tfm_netcoreapp3.1
@@rules_dotnet+//dotnet:tfm_netstandard
@@rules_dotnet+//dotnet:tfm_netstandard1.0
@@rules_dotnet+//dotnet:tfm_netstandard1.1
@@rules_dotnet+//dotnet:tfm_netstandard1.2
@@rules_dotnet+//dotnet:tfm_netstandard1.3
@@rules_dotnet+//dotnet:tfm_netstandard1.4
@@rules_dotnet+//dotnet:tfm_netstandard1.5
@@rules_dotnet+//dotnet:tfm_netstandard1.6
@@rules_dotnet+//dotnet:tfm_netstandard2.0
@@rules_dotnet+//dotnet:tfm_netstandard2.1

To see a condition's definition, run: bazel query --output=build .

This instance of @@+main_extension+paket.main//newtonsoft.json/13.0.3:13.0.3 has configuration identifier 1f4b099. To inspect its configuration, run: bazel config 1f4b099.

For more help, see https://bazel.build/docs/configurable-attributes#faq-select-choose-condition.
```

I'm not sure where to start trying to debug this, so if you've any pointers would be happy to help out.

Reproduce the failure by upgrading the Bazel version used in e2e/net8.0 and running bazel fetch for the Paket dependencies. Start with the generated BUILD.bazel for newtonsoft.json/13.0.3 and the listed configuration conditions; done means the fetch completes successfully under Bazel 8.

Written by the indexing model from the issue text.