Update jackson3 to newer version

[wing328]

PR checklist

• Read the contribution guidelines.
• Run the following to build the project and update samples:

  ./mvnw clean package || exit
  ./bin/generate-samples.sh ./bin/configs/*.yaml || exit
  ./bin/utils/export_docs_generators.sh || exit
  

  (For Windows users, please run the script in WSL)
  Commit all changed files.
  This is important, as CI jobs will verify all generator outputs of your HEAD commit as it would merge with master.
  These must match the expectations made by your contribution.
  You may regenerate an individual generator by passing the relevant config(s) as an argument to the script, for example ./bin/generate-samples.sh bin/configs/java*.
  IMPORTANT: Do NOT purge/delete any folders/files (e.g. tests) when regenerating the samples as manually written tests may be removed.
• If your PR is targeting a particular programming language, @mention the technical committee members, so they are more likely to review the pull request.

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Summary by cubic

Updates the Jackson 3 dependency for generated Java and Kotlin clients and servers. Most templates move from 3.1.5 to 3.1.6, and the native library jumps from 3.1.1 to 3.1.6. Generated sample projects are updated to match.

^{Written for commit f1dc119. Summary will update on new commits.}

[cubic-dev-ai]

All reported issues were addressed across 40 files

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Re-trigger cubic</sub>