Enh #6857: Added `yii\gii\Module::$ignoreTables` that allows you to ignore tables during model generation using `*` (reverted from commit e562f8e4)

Enh #6857: Added `yii\gii\Module::$ignoreTables` that allows you to ignore tables during model generation using `*`

Revert "Fixes #3760: Gii model generator now imports classes when necessary instead of using fully qualified class names"

This reverts commit 0c8faedd.

Fixes #3760: Gii model generator now imports classes when necessary instead of using fully qualified class names

Improved checks where substr_compare is used, replaced more substr + comapre cases with substr_compare

removed unused code $patterns

useTablePefix => useTablePrefix

use tableprefix on gii model generator

without this the form does not allow choosing a different connection id

if component id is different from 'db'

allow extending only one class to add scopes, fixes #2146

TODO:

- [ ] adjust guide docs
- [ ] adjust README files of extensions
- [ ] finish work and fix test breaks