Script list is slow when having large script files/a lot of scripts

[kkthxbye-code]

NetBox version

v3.1.9

Python version

3.9

Steps to Reproduce

1. Create script file with following content in the script directory (test1.py): content
2. Duplicate it a bunch of times: for i in {2..20}; do cp test1.py "test$i.py"; done
3. Open the script list view - /extras/scripts/

Expected Behavior

Load times should not be multiple seconds

Observed Behavior

On my i7 9700 the load times are roughly 2.3 seconds for the above example. On our production server (weaker single core performance) the performance impact is larger.

I have implemented a fix (#8925) which reduces the load time for the reproduction example from ~2300 ms to ~160 ms.