Fix nodeId check for cluster nodes for power report

[ALameLlama]

Description of the problem being solved:

nodeId is always nil here since nodeId isn't in the scope of the loop. I think this might have been copied from above where we do this:

for nodeId, node in pairs(self.build.spec.nodes) do

In this loop we have nodeName but I don't think this is the correct thing to use and node.id seem to be working.

Steps taken to verify a working solution:

• open power report
• select full DPS
• select show unallocated & clusters

Link to a build that showcases this PR:

N/A

Before screenshot:

After screenshot:

I guess this is more of a potential performance improvement since it'll be doing less uneeded work.