Fixed the discrepancy between applicationName between normal app launch and HostFactoryResolver launch

[GMPrakhar]

Fixed the discrepancy between applicationName between normal app launch and HostFactoryResolver launch

#96596

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[steveharter]

For reference, see

runtime/src/libraries/Microsoft.Extensions.Hosting/src/HostBuilder.cs

Line 235 in 7cb8fee

applicationName = Assembly.GetEntryAssembly()?.GetName().Name;

and

runtime/src/libraries/Microsoft.Extensions.HostFactoryResolver/src/HostFactoryResolver.cs

Lines 166 to 169 in b86c463

	args = args.Any(arg => IsApplicationNameArg(arg)) || assembly.FullName is null
	? args
	: args.Concat(new[] { "--applicationName", assembly.FullName }).ToArray();

[steveharter]

We'll need to monitor downstream users - ASP.NET \ EF for breaks here.

[kasperk81]

this is blocking code flow #103553