[4.x] Remove schema check on import users command

[ryanmitchell]

It seems MySQL 8 returns CHAR, instead of string for the column type, so we should allow that.
(Maybe its worth removing the column type check altogether?)

Also updated it to not assume id, but use $model->getKey()

Fixes: #8907

[jasonvarga]

Yeah maybe we just get rid of it. The SQL error kinda explains it if you run into it naturally.

SQLSTATE[01000]: Warning: 1265 Data truncated for column 'id' at row 1 (Connection: mysql, SQL: insert into `users` (`email`, `preferences`, `name`, `id`, `updated_at`, `created_at`) values ([email protected], [], John Smith, 2d2e1188-a217-4697-8a0c-0cd61b1e5465, 2023-11-03 14:41:35, 2023-11-03 14:41:35))