The package validation reports LA0006 error, although it seems that it shouldn't

[iliar-turdushev]

When you introduce a new stable API which is available on net6+ and is not on net62 the build pipeline fails with the LA0006 error. For example, we introduced such an API in the following PR #5670, and that caused the build pipeline to fail https://github.com/dotnet/extensions/runs/33204090775. The LA0006 error stated

Published symbol 'override System.Net.Http.HttpResponseMessage Microsoft.Extensions.Http.Resilience.ResilienceHandler.Send(System.Net.Http.HttpRequestMessage request, System.Threading.CancellationToken cancellationToken);' cannot be deleted to maintain compatibility

We discussed the error in this thread #5670 (comment), and agreed that the error, probably, shouldn't be reported in such a case.

We need to investigate whether the error was triggered correctly or not? If not, then we'll need to fix the analyzer.