[improve][misc] Upgrade Caffeine to 3.2.4

[lhotari]

Motivation

Upgrade Caffeine from 3.2.3 to 3.2.4 to pick up upstream improvements and fixes.

Highlights from the Caffeine 3.2.4 release notes:

• Improved access expiration's read performance by avoiding false sharing effects from timestamp updates
• Fixed head-of-line blocking of expiration queues caused by in-flight async entries (ben-manes/caffeine#1954)
• Resolved various minor issues identified through AI security audits
• Integrated ObjectInputFilter support for JCache compatibility

Modifications

• Bump caffeine version in gradle/libs.versions.toml from 3.2.3 to 3.2.4.
• Update Caffeine entries in distribution/server/src/assemble/LICENSE.bin.txt and distribution/shell/src/assemble/LICENSE.bin.txt to reference the new jar version.

Verifying this change

• Make sure that the change passes the CI checks.

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (add or upgrade a dependency)
• The public API
• The schema
• The default values of configurations
• The threading model
• The binary protocol
• The REST endpoints
• The admin CLI options
• The metrics
• Anything that affects deployment