SONAR-12665 add Bot updating bundled plugins to latest release

SONAR-12665 add Bot updating bundled plugins to latest release

copy and paste GH action from SonarCloud repository but:
 - move bot sources to private repository
 - rename class package
 - Gradle: compile to and with Java 11
 - use other comment for SonarQube:
    - drop versionAlias, always LATEST_RELEASE for SonarQube
    - add Update Center plugin key
 - log content of JIRA ticket to stdout when not running on Github
 - remove slack notification (for now)
 - rely on Update Center to account only for public releases