We are now generating third party notices in our GH builds

[majastrz]

To comply with various open-source license obligations we need to include third party notice files with all the packages we produce from GitHub and ADO builds.

Build artifact	Where the notice file lives
csproj and custom NuGet packages	Included at the root of the package
Language server zip	Included at the root of the zip file
Bicep CLI	Embedded as resources and accessible via --third-party-notices switch
Bicep Module Registry dotnet tool	Included at the root of the NuGet package
VS code VSIX	Included in the extension directory
VS VSIX	Included at the root (once VSIX generation nullref is fixed)
Windows installer	File gets dropped in the installation directory

Additional changes:

• Updated dependabot script to add new repository