Add support for trilogy adapter for MySQL #422

[mrudult]

Adds support for trilogy adapter in Rails >= 6 and <= 7.0.

Rails 7.1 includes trilogy as a built-in adapter and makes it default in Rails 8 - https://github.com/rails/rails/pull/47880, https://rubyonrails.org/2023/10/5/Rails-7-1-0-has-been-released

[mrudult]

It looks like making trilogy default (and built-in in Rails 7.1) is pushed back as it doesn't yet support caching_sha2_password password auth. Thus, adding back the dependency to rails 7.1 gemfile.

[naoyanickf]

plz merge this...this is very important

[naoyanickf]

@n-rodriguez thank you so much!