Allow sorting nodes with less provisioned cpu

[AhmedHanafy725]

Is your feature request related to a problem? Please describe

To offer nodes with less CPU usage to the user on the dashboard for the deployments.

Describe the solution you'd like

maybe as @Omarabdul3ziz suggested with used < total cpus

[Eslam-Nawara]

Verified:
used sdk-go to request nodes with limit filter "sort_by" = "free_cru" and calculated free_cru and it's sorted as requested

• returned nodes

nodeID: 11, free cpu: -33
nodeID: 177, free cpu: -8
nodeID: 174, free cpu: -8
nodeID: 150, free cpu: -8
nodeID: 128, free cpu: -7
nodeID: 171, free cpu: -5
nodeID: 14, free cpu: -5
nodeID: 163, free cpu: -5
nodeID: 127, free cpu: -4

• without using the sort_by filter

nodeID: 14, free cpu: -5
nodeID: 28, free cpu: -51
nodeID: 127, free cpu: -4
nodeID: 128, free cpu: -7
nodeID: 144, free cpu: -1
nodeID: 145, free cpu: -3
nodeID: 146, free cpu: -1
nodeID: 150, free cpu: -8
nodeID: 152, free cpu: -2