Updates for v3.30.0 release (#10342)

* Add v3.30.0 release notes

* Reorganize release notes

* Revert "Reorganize release notes"

This reverts commit 68482eb.

* Update release notes with new release note

* Try categorizing release notes better

* More release note rearranging

* Apply suggestions from code review

Import headline features from docs and remove N/A release note

Co-authored-by: Pedro Coutinho <[email protected]>

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Co-authored-by: Pedro Coutinho <[email protected]>

Author: danudey