Adding queries from past year

[akshay-ranganath]

I have added the queries from past year and updated the table to use 2021*.

Apart from that, I have also updated the query image_alt.sql to report on the attribute decode. The idea is to count the use of decode=lazy. However, I found no result in the sample data. So I am not sure if the query is completely accurate.

[eeeps]

1. Looks like you're counting a custom metric (markup.images.img.decoding) that hasn't been captured.
2. The attribute name=value you're looking for is decoding=async.
3. The value of decoding attributes is being captured in a different custom metric: Images.js

[eeeps]

Gonna go ahead and merge this to my branch, though; we can continue to work on things there.