[DPE-5565] Release notes for 195/149 release

[deusebio]

Release notes for the upcoming release.

I would still like to tune a bit the community message and some other bits around. @grobbie maybe you can craft the main message for the community.

[izmalk]

These are some suggestions on how to improve the existing release notes. Feel free to apply them how you see fit. We can discuss the new structure on the sprint or after.
If no structural changes are wanted, then I'd recommend just adding empty lines after headings, renaming "General updates" sections, and moving some of its contents to the Notes section at the end.

[deusebio]

@izmalk I have addressed the comments whenever it was sensible to do, while keeping consistency with the previous release notes for a similar look and feel.

I would leave it up to you and Andreia if we want to change the format. But when doing that, we should probably reformat also the other pages, always keeping a similar style across the documentation

[izmalk]

I still see some room for improvement and a few comments that could be addressed, but nothing critical. Please check the summary for Kafka and ZooKeeper changes, the rest is optional.

[grobbie]

small changes needed, otherwise pretty good

[izmalk]

Looks good for the older comments but we need to take into account the newest changes in terminology.

[deusebio]

@izmalk thanks for spotting this. I have applied the changes, please check 85c249f

[izmalk]

I like the structure that we have now but I have a non-blocking suggestion for the naming of components.
Also, one Apache Kafka renaming is missing.

[deusebio]

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