Move approver/maintainer list to the repo (#503)
Move approver/maintainer list to the repo (#503)

* Move approver/maintainer list to the repo

Signed-off-by: Bogdan Drutu <3f8e17047c2434e5c82a61403e56b9ef3e226d99@gmail.com>

* Move owners at the bottom, fix markdown issues

Signed-off-by: Bogdan Drutu <3f8e17047c2434e5c82a61403e56b9ef3e226d99@gmail.com>

open-telemetry/opentelemetry-collector-contrib,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector,open-telemetry/opentelemetry-collector-contrib