[pgAdmin4][debugger]: RM #1354 & RM #1323

Hi,

Please find attached patch file for the fix of RM #1354 and RM #1323.

RM 1354 - Debugging PL/pgSQL causes "Debugger: Error fetching variable
information".

RM 1323 - Debugger: Continue execution error displayed if debug plpgsql
function in Desktop Runtime Application.

Both the issue are related. Below are the issue description and solution.

*Issue :- *

We are getting error of "fetching variable information" and "execution
error" because as one query is already in state of execution and at the
same time without getting its result we are sending another query to fetch
the variable and stack information and due to that we are getting the error.

*Solution:-*

We should give enough time for execution query to finish its operation and
then we should get the function debug information like variable info, stack
info, breakpoint info etc.

Do review it and let us know for comments.

Thanks,
Neel Patel