update mailmap with more deduplicated names
+Alexandra Iordache <aghecen@amazon.com> Alexandra Ghecenco <aghecen@amazon.com>
Alexandru Branciog <branciog@amazon.com> <31914537+alexbranciog@users.noreply.github.com>
Bogdan Ionita <bci@amazon.com> <bci@u249973545f4b59.ant.amazon.com>
+Marc Brooker <mbrooker@amazon.com> <marcbrooker@users.noreply.github.com>
Radu Weiss <raduweis@amazon.com> <31901393+raduweiss@users.noreply.github.com>
Rolf Neugebauer <neugebar@amazon.com> <rn@rneugeba.io>
