Add 2.17.0 release notes

[reta]

Description

Add 2.17.0 release notes

Related Issues

Part of https://github.com/opensearch-project/custom-codecs/issues/181

Check List

• [ ] New functionality includes testing.
• [ ] New functionality has been documented.
• [ ] API changes companion pull request created.
• [ ] Commits are signed per the DCO using --signoff.
• [ ] Public documentation issue/PR created.

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