Unify generic expr rewrite functions into the `datafusion_expr::expr_rewriter`

[r4ntix]

Is your feature request related to a problem or challenge?

I noticed that currently we have some generic expr rewrite funtions scattered in datafusion_expr::expr_rewriter and datafusion_optimizer::utils.

For example:
https://github.com/apache/arrow-datafusion/blob/373e291faba5b3c722018367e01a6b59a91bddee/datafusion/optimizer/src/utils.rs#L218-L225
https://github.com/apache/arrow-datafusion/blob/373e291faba5b3c722018367e01a6b59a91bddee/datafusion/expr/src/expr_rewriter/mod.rs#L140-L144

New readers may be confused.

Describe the solution you'd like

Unify generic expr rewrite functions into the datafusion_expr::expr_rewriter for maintenance

Describe alternatives you've considered

No response

Additional context

No response