Jenkins 2.574

Changes

• +Remove pre 2.0 detached plugins (#27098) @timja, @claude, @Copilotadded
• +Reduce size of war by excluding unused BC jar (#27099) @timjaadded
• +Remove comments from properties and jelly files in shipped war (#27100) @timja, @Copilotadded
• +Standardise Jenkins branding during Sign in, Registration, and About Jenkins (#27046) @janfaracikadded
• +Make remember-me token validity configurable via system property (#26833) @annplatoworldadded
• +Add expression examples to "Restrict where builds can run" help (#27117) @arimu1added
• *Fix NPE after Jenkins restart when UpstreamCause is a Pipeline job (#27094) @mawinter69fixed
• *Fix missing shadow and blur on the global search results dropdown (#27113) @thswlsqlsfixed
• *Fix PackedMap.values() returning keys instead of values (#27110) @thswlsqlsfixed
• *Fix HttpSessionListener jakarta sessionDestroyed bridge delegating to sessionCreated (#27090) @RealFakeAccountfixed
• ·JENKINS-75134 - Clarify unclear Spanish translation for 'Unprotected URLs' blurb (#27048) @AbdelHamdyGhanemother