Align validation metadata handling in `PayloadMethodArgumentResolver`

[spring-projects-issues]

Gary Russell opened SPR-17319 and commented

Currently, the validate() method parses the parameter annotations on every call.

It should be possible to cache the results and only parse on the first call.

---

Affects: 5.1 GA

[spring-projects-issues]

Juergen Hoeller commented

This applies to several method argument resolvers in the web space as well. A consistent caching strategy for validation metadata across all of them sounds worthwhile.

[jhoeller]

A recent related change #26787 - reusing this ValidationAnnotationUtils should go along nicely here.