Avoid false bean-method warnings on overrides

The Spring Boot language server warned that public @Bean methods should not be public even when the method was required by an inherited contract, such as WebMvcConfigurer#getValidator(). That produced conflicting guidance for valid @Override methods.

Updated BeanMethodNotPublicReconciler to rely on JDT method override binding behavior for inherited methods, including methods declared in dependency JARs, and added a focused WebMvcConfigurer override fixture.

• Removes noisy validation warnings for valid Spring MVC and Spring Boot configuration code.
• Improves IDE trust by aligning the @Bean visibility rule with Java override requirements instead of treating every public @Bean method as suspicious.
• Covers inherited interface and superclass contracts, including framework methods resolved from dependency JARs.

• Added Spring validation coverage for a public @Bean override using WebMvcConfigurer#getValidator().
• Updated BeanMethodNotPublicReconciler tests around inherited override detection.
• PR validation ran the Spring Boot language-server Maven test slice for SpringValidationBeanMethodNotPublicTest and BeanMethodNotPublicReconcilerTest.