Replace unreliable assembly location code with reliable one

[erdembayar]

NuGet Product Used

NuGet.exe

Product Version

VS, dotnet, nuget.exe

Worked before?

n/a

Impact

None

Repro Steps & Context

When code inlining happens then Assembly.GetExecutingAssembly().Location may point to wrong location.
So we need to replace with typeof(T).Assembly.Location for reliability. This concern came up during review of another internal repo.

Verbose Logs

No response