Support ActiveRecored 7.1.x

[hirocaster]

Since ActiveRecored 7.1, using #execute no longer works as intended.

ref https://github.com/rails/rails/commit/63c0d6b31bcd0fc33745ec6fd278b2d1aab9be54#diff-0b861bb8bc857373d0f0280779eb119e2937ee0edd1cc 3497292c7d14e909591 #26

Instead, I have made a change to use #raw_execute.

Since #raw_execute is a private method, I'm not too keen on it, but if you have a better implementation, please give me feedback.

Currently, this Patch is not in production quality, so please use it at your own risk. Also, feedback is welcome.