2.457

📦 Jenkins Core updates

• Update to Jenkins 2.457 (changelog)

💥 Breaking changes

• remove deprecated install-plugin.sh script from Linux jdk11 images (#1863) @lemeurherve

📝 Documentation updates

• Use permanent changelog location and default to weekly (#1865) @timja

👻 Maintenance

• keep only one Dockerfile per Linux image variant (#1857) @lemeurherve
• remove unused .ci/common-functions.sh script (#1869) @lemeurherve
• Verify SHA256 checksum of plugin installation manager tool (#1868) @basil
• set jlink compression arg to zip-6 for Windows jdk21 image (#1864) @lemeurherve

📦 Dependency updates

• bump plugin manager to 2.13.0 (#1874) @jenkins-dependency-updater
• bump ubi9/ubi from 9.3-1610 to 9.4-947 in /17/rhel/ubi9/hotspot (#1872) @dependabot
• bump updatecli/updatecli-action from 2.56.0 to 2.57.0 (#1871) @dependabot