Gradually increase LFC quota without taking working set into consideration

[stradig]

To improve performance of autoscaled computes @Bodobolero's tests showed that the LFC quota can be a deciding factor for the performance. As an experiment we want to gradually increase the LFC quote and see what benefits we are getting from that and in what kinds of problems we are running into.

[skyzh]

ref issue on the compute side neondatabase/neon#6919

[stradig]

@skyzh Is this finished or are you planning further changes?

[skyzh]

Planning on remove the limit on vm-builder. Plan to do it after the swap config change gets released so that the disk usage metrics can be observed without interference of other factors.

[skyzh]

vm-monitor changes: neondatabase/neon#8066