Remove APIs deprecated for removal in 6.2
This commit removes the following obsolete and deprecated APIs.
- org.springframework.util.Base64Utils
- org.springframework.cache.jcache.interceptor.JCacheOperationSourcePointcut
- org.springframework.http.client.AbstractClientHttpResponse
- org.springframework.http.client.ClientHttpResponse.getRawStatusCode()
- org.springframework.http.client.observation.ClientHttpObservationDocumentation.HighCardinalityKeyNames.CLIENT_NAME
- org.springframework.web.reactive.function.client.ClientHttpObservationDocumentation.HighCardinalityKeyNames.CLIENT_NAME
- org.springframework.web.filter.reactive.ServerWebExchangeContextFilter.get(Context)
- org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleBindException(...)
- org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver.handleBindException(...)
Closes gh-30608
a85bf3185e