NFR tests shows a consistent issue with Reconfig test

NFR pipeline runs show errors in reconfig tests related to nginx.conf not being applied correctly consistently for two runs and need to be investigated

Run 1 - https://github.com/nginx/nginx-gateway-fabric/pull/3991
Run 2 - https://github.com/nginx/nginx-gateway-fabric/pull/3960 

Other issues that also need to be fixed 

- TTR images do not get rendered properly for scale test Listeners. 