minor #22625 [WebServerBundle] Flag commands as private (chalasr)

This PR was merged into the 3.3-dev branch.

Discussion
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[WebServerBundle] Flag commands as private

| Q             | A
| ------------- | ---
| Branch?       | 3.3
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

No need for having them public.

Commits
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73c5198 Flag webserver commands as private

src/Symfony/Bundle/WebServerBundle/Resources/config/webserver.xml

@@ -7,23 +7,23 @@
     <services>
         <defaults public="false" />
 
-        <service id="web_server.command.server_run" class="Symfony\Bundle\WebServerBundle\Command\ServerRunCommand" public="true">
+        <service id="web_server.command.server_run" class="Symfony\Bundle\WebServerBundle\Command\ServerRunCommand">
             <argument>%kernel.root_dir%/../web</argument>
             <argument>%kernel.environment%</argument>
             <tag name="console.command" />
         </service>
 
-        <service id="web_server.command.server_start" class="Symfony\Bundle\WebServerBundle\Command\ServerStartCommand" public="true">
+        <service id="web_server.command.server_start" class="Symfony\Bundle\WebServerBundle\Command\ServerStartCommand">
             <argument>%kernel.root_dir%/../web</argument>
             <argument>%kernel.environment%</argument>
             <tag name="console.command" />
         </service>
 
-        <service id="web_server.command.server_stop" class="Symfony\Bundle\WebServerBundle\Command\ServerStopCommand" public="true">
+        <service id="web_server.command.server_stop" class="Symfony\Bundle\WebServerBundle\Command\ServerStopCommand">
             <tag name="console.command" />
         </service>
 
-        <service id="web_server.command.server_status" class="Symfony\Bundle\WebServerBundle\Command\ServerStatusCommand" public="true">
+        <service id="web_server.command.server_status" class="Symfony\Bundle\WebServerBundle\Command\ServerStatusCommand">
             <tag name="console.command" />
         </service>
     </services>