Change py-embedded-server from WARN to INFO logging (deephaven#5644)

The python embedded Deephaven server does not currently show the end-user any INFO logging. It was stated that the default was WARN so that the end-user doesn't get command line spam, but that is already covered in the setup - the slf4j / logback logging does _not_ hit the terminal regardless. This is only applicable for logging that hits the web UI via LogBufferAppender / ConsoleService.SubscribeToLogs.

py/embedded-server/java-runtime/src/main/resources/logback-minimal.xml

@@ -15,7 +15,7 @@
  <!--<logger name="io.netty" level="INFO"/>-->
  <!--<logger name="io.deephaven" level="INFO"/>-->
 
- <root level="warn">
+ <root level="info">
  <appender-ref ref="LOGBUFFER" />
  </root>
 </configuration>