Use assembly name for DotnetAssembly{Compile,Runtime}Info

[sin-ack]

Previously, we used the name of the target directly, which caused problems in the following configuration:

csharp_binary(
    name = "bar",
    out = "foo",
    // ...
)

publish_binary(
    name = "Bar",
    binary = ":bar",
)

publish_binary uses the name specified in DotnetAssemblyRuntimeInfo to generate the {assembly}.deps.json and {assembly}.runtimeinfo.json files, which are required for the .NET application to run. Since this was set to the target name, the generated filenames in the case above would be bar.deps.json and bar.runtimeinfo.json, causing the following error when trying to run the publish target:

A fatal error was encountered. The library 'libhostpolicy.so' required to execute the application was not found in '/dotnet/sdk/path'.

The default case is unaffected, since assembly_name defaults to the name attribute if out is not given.

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[purkhusid]

Thanks for you contribution!