Update the ANSI SQL Compatibility page

[rfraposa]

This page here: https://clickhouse.com/docs/en/sql-reference/ansi/

It's tricky because it involves a lot of manual checking...but we should try our best to keep it up to date.

[gingerwizard]

Assigning to @melvynator @qoega as this is really abig lift and needs to be owned by PMs.

[qoega]

I agree, but we can't handle it without additional hands. I shared in DM in my opinion it should be covered by Melvyn's new hire or another one. To be done properly.

[Blargian]

Page no longer exists, closing