Handle missing exceptions in WebMvcMetricsFilter

Prior to this commit, exceptions nested in
`NestedServletExceptions` would not be recorded by the
`WebMvcMetricsFilter`. This commit ensures that exceptions
happening downstream (e.g. happening while writing the response
body itself) are properly recorded.

See micrometer-metrics/micrometer#1190
See gh-16014

Author: izeye

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/metrics/web/servlet/WebMvcMetricsFilter.java

@@ -130,6 +130,10 @@ private void filterAndRecordMetrics(HttpServletRequest request,
 			record(timingContext, response, request, ex.getCause());
 			throw ex;
 		}
+		catch (ServletException | IOException | RuntimeException ex) {
+			record(timingContext, response, request, ex);
+			throw ex;
+		}
 	}
 
 	private TimingContext startAndAttachTimingContext(HttpServletRequest request) {