Unify naming of buildbot commands

Rename buildbot scripts so they all begin with the prefix "buildbot-"
as this lets autocomplete make life easy for you when working with
device tests from the command line.

Temporarily add symlinks for keep other infra working until that is
updated too.

Test: manual
Change-Id: I5c14448ca4ce36eff7fa3ee149cee7f822e0ca86
9 files changed