Review reliability recommendations and publish to docs.ms

[bgavrilMS]

Existing doc: https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/wiki/High-availability

[pmaytak]

Also relevant docs that need review: https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/wiki/Exceptions https://docs.microsoft.com/en-us/azure/active-directory/develop/msal-error-handling-dotnet

[localden]

Closing as this is covered in High Availability. We can make incremental improvements to the doc there now.