[ruby/grape] Use trilogy for the MySQL adapter (#10413)
Trilogy is a new client library for MySQL-compatible database servers,
designed for performance, flexibility, and ease of embedding. It is used
by Github and Shopify in production and will probably replace the mysql2
library.
https://github.com/trilogy-libraries/trilogy
+-----+-------------+-----+
| name| branch_name| db|
+-----+-------------+-----+
|grape| master|19181|
|grape|grape/trilogy|21311|
+-----+-------------+-----+