Return early in \Drupal\layout_builder\InlineBlockEntityOperations::handlePreSave if the entity is syncing

I bumped into the same problem earlier this week, but from a different angle: publishing a workspace with nodes that contain inline blocks would duplicate those blocks.

Applied a nitpicky suggestion

Ran the test-only feature here https://git.drupalcode.org/issue/drupal-3425890/-/jobs/1014885

Change makes sense.

LGTM

Rerunning that failure

Can't imagine adding a :void caused

    Testing Drupal\Tests\help\Functional\Update\HelpTopicsMerge
    F                                                                   1 / 1
    (100%)
    
    Time: 00:00.653, Memory: 4.00 MB
    
    There was 1 failure:
    
    1) Drupal\Tests\help\Functional\Update\HelpTopicsMerge::testHelpTopicsMerge
    Failed to run installer database tasks: Failed to connect to your database
    server. The server reports the following message: SQLSTATE[HY000] [2002]
    Connection refused [Tip: This message normally means that there is no MySQL
    server running on the system or that you are using an incorrect host name
    or port number when trying to connect to the server. You should also check
    that the TCP/IP port you are using has not been blocked by a firewall or
    port blocking service.] .Is the database server running?Does the database
    exist or does the database user have sufficient privileges to create the
    database?Have you entered the correct database name?Have you entered the
    correct username and password?Have you entered the correct database
    hostname and port number?

Committed/pushed to 11.x and cherry-picked to 10.3.x, thanks!

Automatically closed - issue fixed for 2 weeks with no activity.