Upgrade to SonarQube Server 2026 Release 4.1

[denniebouman]

https://community.sonarsource.com/t/sonarqube-server-2026-release-4-1/187167

https://www.sonarsource.com/products/sonarqube/whats-new/2026-4/

Release notes (New and enhanced features, Update notes and Deprecations and removals):

• https://docs.sonarsource.com/sonarqube-server/server-update-and-maintenance/release-notes#new-and-enhanced-features
• https://docs.sonarsource.com/sonarqube-server/server-update-and-maintenance/release-notes#id-2026.4
• Elasticsearch 9 (9.4.3), now requires read and write access to the /tmp directory