[libraries][tvOS] Update Issue causing System.Net.Requests to fail (#56624)
* [libraries][iOS][tvOS] Update Issue causing System.Net.Requests to fail
* [libraries][tvOS] Default preauthenticate in InnerSendAsync to false
* Defalt SendWithProxyAuthAsync doRequestAuth parameter to false
* [libraries] Add IsBinaryFormatterSupported ConditionalFact
* [libraries][tvOS] Add ActiveIssue for loopback request header reading failure
* Fix location of ActiveIssue
Co-authored-by: Mitchell Hwang <mitchell.hwang@microsoft.com>