Migrate from assertThat(foo).named("foo") to assertWithMessage("foo").that(foo).

(The exact change is slightly different in some cases, like when using custom subjects or check(), but it's always a migration from named(...) to [assert]WithMessage(...).)

named(...) is being removed.

This CL may slightly modify the failure messages produced, but all the old information will still be present.

More information:
  []

Tested:
    TAP --sample for global presubmit queue
    []

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=245762634

javatests/google/registry/testing/LogsSubject.java

@@ -15,7 +15,7 @@
 package google.registry.testing;
 
 import static com.google.common.truth.Truth.assertAbout;
-import static com.google.common.truth.Truth.assertThat;
+import static com.google.common.truth.Truth.assertWithMessage;
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.testing.TestLogHandler;
@@ -76,8 +76,9 @@ public class LogsSubject extends Subject<LogsSubject, TestLogHandler> {
         .contains(message);
     for (String messageCandidate : messagesAtLevel) {
       if (messageCandidate.contains(message)) {
-        return new Which<>(assertThat(messageCandidate)
-            .named(String.format("log message at %s matching '%s'", level, message)));
+        return new Which<>(
+            assertWithMessage(String.format("log message at %s matching '%s'", level, message))
+                .that(messageCandidate));
       }
     }
     throw new AssertionError("Message check passed yet matching message not found");