Report AspectCreationException to the user

Since ec4be00,
`AspectCreationException`s were no longer reported to the user,
resulting in error messages such as:

```
ERROR: Analysis of target '//pkg:foo' failed; build aborted:
```

With this commit, the error looks like this instead:

```
ERROR: Evaluation of aspect //aspects:aspects.bzl%my_aspect on //pkg:foo failed: <causes...>
```

Context: bazelbuild/bazel-central-registry#327

src/main/java/com/google/devtools/build/lib/skyframe/ConfiguredTargetFunction.java

@@ -465,6 +465,10 @@ public SkyValue compute(SkyKey key, Environment env)
       }
       throw new ReportedException(e);
     } catch (AspectCreationException e) {
+      if (!e.getMessage().isEmpty()) {
+        // Report the error to the user.
+        env.getListener().handle(Event.error(null, e.getMessage()));
+      }
       throw new ReportedException(
           new ConfiguredValueCreationException(
               targetAndConfiguration, e.getMessage(), e.getCauses(), e.getDetailedExitCode()));