These files are the license and third-party notices of the .NET runtime
(NativeAOT) that is compiled into /usr/bin/esx.

Copied from the .NET SDK 10.0.401 installation (~/.dotnet/LICENSE.txt and
~/.dotnet/ThirdPartyNotices.txt) that ships runtime 10.0.12, the runtime
version embedded in esx. Upstream: https://github.com/dotnet/runtime