[JENKINS-69787] Use icon-based dismiss buttons in admin monitors

[shivapaliwal]

• Created reusable dismissButton.jelly component with symbol-close icon
• Updated 15 admin monitor message files to use icon button instead of text
• Replaced <f:submit value=${%Dismiss}/> with <f:dismissButton/>
• Improved UX consistency with repeatableDeleteButton pattern
• Maintained accessibility with tooltip support
• Preserves form submission behavior and name attributes

The new dismissButton component:

• Uses symbol-close icon for visual consistency
• Includes tooltip with localized 'Dismiss' text
• Supports optional name attribute for form handling
• Applies jenkins-button--tertiary styling

Files updated:

• hudson/node_monitors/MonitorMarkedNodeOffline
• hudson/security/csrf/DefaultCrumbIssuer/ExcludeSessionIdAdministrativeMonitor
• hudson/diagnosis/HudsonHomeDiskUsageMonitor
• hudson/diagnosis/ReverseProxySetupMonitor
• hudson/diagnosis/TooManyJobsButNoView
• hudson/diagnosis/OldDataMonitor
• jenkins/security/apitoken/ApiTokenPropertyEnabledNewLegacyAdministrativeMonitor
• jenkins/security/apitoken/ApiTokenPropertyDisabledDefaultAdministrativeMonitor
• jenkins/security/csrf/CSRFAdministrativeMonitor
• jenkins/security/csp/impl/CspRecommendation
• jenkins/model/BuiltInNodeMigration
• jenkins/diagnostics/SecurityIsOffMonitor
• jenkins/diagnostics/RootUrlNotSetMonitor
• jenkins/diagnostics/ControllerExecutorsNoAgents
• jenkins/diagnostics/ControllerExecutorsAgents

Fixes #

Testing done

Screenshots (UI changes only)

Before

After

Proposed changelog entries

• human-readable text

Proposed changelog category

/label

Proposed upgrade guidelines

N/A

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[NotMyFault]

This is inherently wrong and makes no sense.
I'd recommend trying to understand what the issue is, before submittin a PR.

[shivapaliwal]

/label rfe