Exclude netty-buffer and jackson-annotations from the native-jar

[ayeshLK]

Purpose

$subject

Fixes: ballerina-platform/ballerina-library#7061

Examples

N/A

Checklist

• Linked to an issue
• Updated the specification
• Updated the changelog
• Added tests
• Checked native-image compatibility

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✅ ayeshLK
❌ Ayesh Almeida

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[NipunaRanasinghe]

LGTM