Add build for trilogy client

In rails/rails#47880 we're adding Trilogy as an
additional mysql client for Rails. This change adds a new build for it.

pipeline-generate

@@ -138,6 +138,8 @@ def step_for(subdirectory, rake_task, ruby: nil, service: "default", pre_steps:
 
   if rake_task.start_with?("mysql2:")
     rake_task = "db:mysql:rebuild #{rake_task}"
+  if rake_task.start_with?("trilogy:")
+    rake_task = "db:trilogy:rebuild #{rake_task}"
   elsif rake_task.start_with?("postgresql:")
     rake_task = "db:postgresql:rebuild #{rake_task}"
   end
@@ -228,6 +230,7 @@ end
   actionview      test                default
   activejob       test                default
   activerecord    mysql2:test         mysqldb
+  activerecord    trilogy:test        mysqldb
   activerecord    postgresql:test     postgresdb
   activerecord    sqlite3:test        default
 ).each_slice(3) do |dir, task, service|
@@ -270,6 +273,10 @@ step_for("activerecord", "mysql2:test", service: "mysqldb") do |x|
   x["label"] += " [mysql_5_7]"
   x["env"]["MYSQL_IMAGE"] = "mysql:5.7"
 end
+step_for("activerecord", "trilogy:test", service: "mysqldb") do |x|
+  x["label"] += " [mysql_5_7]"
+  x["env"]["MYSQL_IMAGE"] = "mysql:5.7"
+end
 if RAILS_VERSION >= Gem::Version.new("5.x")
   step_for("activerecord", "mysql2:test", service: "mysqldb") do |x|
     x["label"] += " [mariadb]"