MAINTAINERS: Remove me as a reviewer for the build and test/avocado

MAINTAINERS: Remove me as a reviewer for the build and test/avocado

Remove me as a reviewer for the Build and test automation and the
Integration Testing with the Avocado Framework and add Beraldo
Leal.

Signed-off-by: Willian Rampazzo <willianr@redhat.com>
Reviewed-by: Beraldo Leal <bleal@redhat.com>
Message-Id: <20211122191124.31620-1-willianr@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20211129140932.4115115-7-alex.bennee@linaro.org>