Update Jackson packages to v2.20.0

[Copilot]

This PR updates all Jackson dependencies from v2.19.2 to v2.20.0 across the repository.

Changes Made

1. Updated Jackson BOM version in dependencyManagement/build.gradle.kts from 2.19.2 to 2.20.0
2. Updated explicit Jackson databind dependency in ibm-mq-metrics/build.gradle.kts from 2.19.2 to 2.20.0
3. Fixed deprecated API usage in XraySamplerClient.java by replacing setSerializationInclusion() with setDefaultPropertyInclusion() to address deprecation warning introduced in Jackson 2.20.0

Breaking Changes

None - this is a minor version upgrade that maintains backward compatibility.

Testing

• ✅ All existing tests pass (500 actionable tasks: 59 executed, 441 up-to-date)
• ✅ Full build successful with no compilation errors
• ✅ Specific testing of Jackson-heavy modules (aws-xray, aws-resources, ibm-mq-metrics) confirms functionality remains intact
• ✅ Code formatting applied with spotlessApply

The update addresses the deprecation warning that was being treated as an error in the build, ensuring compatibility with Jackson 2.20.0 while maintaining all existing functionality.

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