Mark `Sentry.Azure.Functions.Worker` as deprecated on NuGet

[jamescrosswell]

Mark the package Sentry.Azure.Functions.Worker on NuGet as deprecated, so that NuGet Explorer UIs show the deprecation, as well as dotnet package list --deprecated.

Originally posted by @Flash0ver in #4693 (comment)

[linear]

NET-522

[bitsandfoxes]