efficient_full_table_scan: upgrade to new go and publish generic local

[tarzanek]

go installation steps

[tarzanek]

tested in users env with new go versions, explained in readme how to use for composite keys too fixed using template for new cql syntax

[tarzanek]

@tzach @guy9 can you review/merge?

[tarzanek]

@DanielHe4rt @zimnx can you re-review and merge? (or approve and I will merge)