Add ServerWebExchange parameter to AuthorizationRequestCustomizer

[kse-music]

Closes gh-16306

[sjohnr]

@kse-music thanks for the PR. I apologize for the delay in reviewing. However, I don't feel confident that we want to pursue simply introducing a BiConsumer here. This isn't generally the best way to expose a new parameter for customization, and I don't see any precedent for it in Spring Security. For that reason, I'm going to close this PR for now and ask that you weigh in on the issue with your use case and ideas so we can find a path forward through discussion before moving to the PR stage. Thanks for understanding.