[Sirius][Logger] Use slf4j logger everywhere in Papyrus-Sirius

Bugzilla Link	580684
Status	ASSIGNED
Importance	P3 enhancement
Reported	Sep 05, 2022 09:04 EDT
Modified	Nov 10, 2023 03:55 EDT
Version	0.7.0
See also	Gerrit change 195567

Description

Papyrus-Sirius is currently using 2 loggers:

• the logger provided by org.eclipse.papyrus.infra.core.log
• a copy of this logger provided by org.eclipse.papyrus.sirius.log
  
  There is no reason to not use the well known Logger log4j provided by apache (org.apache.log4j).
  
  The purpose of this bug is to delete the plugin org.eclipse.papyrus.sirius.log and to replace all calls to these logger by a call to the log4j logger.
  We decided to keep the previous behavior. Each plugni Activator declares a logger used everywhere by the plugin.