Negotiate\LdapAdapter.cs should query only for required LDAP attributes instead of all available.

[filimonic]

Describe the bug

In internal class Microsoft.AspNetCore.Authentication.Negotiate.LdapAdapter, SearchRequests are constructed using attributeList: null, which means query for all available attributes.

LdapAdapter should query only for attributes it requires (memberOf and, possibly, distinguishedName).

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We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.