## `loadTableInfo` add context parameter
### Main change
```diff
+++ func (engine *Engine) loadTableInfo(ctx context.Context, table *schemas.Table) error
--- func (engine *Engine) loadTableInfo(table *schemas.Table) error
```
### Situation
After #2200, I built custom dialect to control the SQL. I find that everything else is fine, except when the `SYNC` method executes with an exception.
The reason is that the `loadTableInfo` method calls the `GetIndexes` and `GetColumns` methods with the dialect during execution. **The context passed to these two methods are all `engine.defaultContext` not the current session's context.** So, I think the `loadTableInfo` method should add the context parameter to ensure that the correct context is used during execution.
### Review Note
1. dialect's `GetColumns` and `GetIndexes` methods are **only** used here, if the context here is incorrect, then the context parameter is invalid.
2. `loadTableInfo` method is only used in `SYNC` and `DBMetas` methods, `SYNC` should pass the session's context, while `DBMetas` has no problem passing `engine.defaultContext`.
All in all, I think this change should not affect other function.
Reviewed-on: https://gitea.com/xorm/xorm/pulls/2297
Co-authored-by: LinkinStars <linkinstar@foxmail.com>
Co-committed-by: LinkinStars <linkinstar@foxmail.com>
LinkinStars
brookechen
Lunny Xiao