Add support to ActiveRecord 7.0

[gridanjbf]

No description provided.

[tagliala]

@gridanjbf I've rebased from master and cleaned up the commits

Meanwhile, something changed in ruby edge and

Don't know how to build task 'db:structure:load' (See the list of available tasks with `rake --tasks`)
       Did you mean?  db:test:load

rspec ./spec/aruba/rake_task_spec.rb:11 # rake tasks bundle exec rake -T is expected to have output: /db:structure:load/
rspec ./spec/aruba/rake_task_spec.rb:62 # rake tasks db:structure:load given a file db/structure.sql with default username and password is expected to be successfully executed
rspec ./spec/aruba/rake_task_spec.rb:68 # rake tasks db:structure:load given a file db/structure.sql without a specified username and password is expected to be successfully executed

The old branch is available here and specs are failing there too

[tagliala]

Ref: rails/rails@cf269d5