Add query load information to the query profile

Add query load information to the query profile to track if the performance regression is related to the insufficient resources of the node, and also recommend if the current pool configurations or host configurations are optimal.

The load information should include:

• Number of running queries of the executor group on which the query is scheduled
• Number of running fragment instances of the hosts on which the query is scheduled
• Used/Reserved memory of the hosts on which the query is scheduled
• Some other useful metrics