Upgrade notes for 1.17 release

[artberger]

Version

main (1.17.x beta)

Describe the requested changes

Update the upgrade notes for the 1.17 release.

In general, check the changelog for breaking changes and other big fixes.

Particular issues to capture:

• [ ] See discussion of deprecated fields and migration steps in https://github.com/solo-io/gloo/pull/9529
• [ ] 1.17 scale testing

Link to any relevant existing docs

https://docs.solo.io/gloo-edge/main/operations/upgrading/

Browser Information

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Additional Context

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