Replace already legacy value 'replace' in form #ajax method

Problem/Motivation

Some of form uses '#ajax' which specify 'replace' as method value.
But this value is already labeled as legacy support since Drupal 8, and removed from Drupal 11.

Proposed resolution

Use 'replaceWith' as '#ajax' method value.
Legacy 'replace' value is automatically replaced with 'replaceWith' internally till the Drupal 10.x branch.
Search API module was changed to 'replaceWith' already.
#3425235: Make the Search API module compatible with Drupal 11

Remaining tasks

User interface changes

No.

API changes

No.

Data model changes

No.

Release notes snippet

No.