Optimise ICAT_communication SQL Queries

[Pasarus]

Issue raised by: [developer]

What?
Optimise SQL queries where possible within icat_communication.py
I believe that the current structure of SQL queries could be improved to be more efficient.

Where?
WebApp/autoreduce_webapp/autoreduce_webapp/icat_communication.py

How?

• Remove repetitiveness where possible.
• Optimise SQL query structure

How to test the issue is resolved
Compare optimisation of query before and after changes
Are queries simpler in design (no complex joins etc)?