feature request: collect top 10 queries

[rishi-raj-jain]

Currently, one needs to run the command below to give us the top 10 queries:

SELECT  
    query,  
    total_exec_time AS total_time,  
    calls,  
    mean_exec_time AS avg_time_per_call  
FROM  
    pg_stat_statements  
ORDER BY  
    total_exec_time DESC  
LIMIT 10;

but is something we can add to the pg-prechecks script itself