Stop copying LogicalPlan and Exprs in `PushDownLimit`

[alamb]

Is your feature request related to a problem or challenge?

Part of https://github.com/apache/datafusion/issues/9637

As part of making the planner faster, we are updating the optimizer passes to avoid copying LogicalPlan and Expr (see https://github.com/apache/datafusion/issues/9637)

Describe the solution you'd like

I would like to reduce the amount of copying in this pass (even though it doesn't appear in current profiling)

Describe alternatives you've considered

Apply the model from @Lordworms in https://github.com/apache/datafusion/pull/10166 to this pass 2. Update OptimizerRule::supports_rewrite` to return true

1. Update OptimizerRule to use rewrite
2. Update the pass itself to not copy the LogicalPlan (ideally using the TreeNode API) - it is implemented for LogicalPlan (API) and Expr (API)

Other examples: https://github.com/apache/datafusion/pull/10218

Additional context

[kavirajk]

take

[alamb]

@kavirajk -- have you had a chance to work on this issue? If not, do you mind if someone else does?

[alamb]

I made https://github.com/apache/datafusion/pull/10501 to pull some of the code out into a function to maybe make this easier

[kavirajk]

@kavirajk -- have you had a chance to work on this issue? If not, do you mind if someone else does?

Sorry @alamb didn't get a chance to work on it unfortunately. Agree, feel free to work on it.

[alamb]

No worries. Thanks @kavirajk

[alamb]

I bashed out a PR for this change this morning: https://github.com/apache/datafusion/pull/10508