[Release] v1.358.0 (#7164) (#7165)

* [New] Configure Failover for HAProxy on Akamai (#7162)

* Configure Failover for HAProxy on Akamai

* Tech Edit 1

* Tech Edit 2

* Tech Edit 3

* Tech Edit 4

* Copy edits

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* Block storage migration azure (#7156)

* Import from external editor

* Copy edits

* Copy edits

* Copy edits

* Copy edits

* Copy edits

* Copy edits

* Copy edits

* Copy edits, add diagram

* Update diagram

* copy edits

* typo fix

* Remove failover guide from PR

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* [Update]Understanding iptables (#7161)

* [Update]Understanding iptables

Updated the tables and the chains supported after validating:

```root@localhost:~# sudo iptables -t nat -L
Chain PREROUTING (policy ACCEPT)
target     prot opt source               destination         

Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         

Chain POSTROUTING (policy ACCEPT)
target     prot opt source               destination     ```

* format the table

* Update theme (#7163)

* Update theme

- Header and footer updates
- Add file-issue buttons on hover to guide paragraphs/text
  (Note: this is temporarily disabled in the site configuration)

* Temporarily disable file issue button feature

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Co-authored-by: John Dutton <118553549+jddocs@users.noreply.github.com>
Co-authored-by: Andy Stevens <taylorstevens@gmail.com>
Co-authored-by: Adam Overa <adamovera@protonmail.com>
Co-authored-by: Nathan Melehan <nmelehan@gmail.com>
Co-authored-by: John Dutton <johndutton.update@gmail.com>
Co-authored-by: Rajakavitha Kodhandapani <krajakavitha@gmail.com>