Add Totoal_Memory and Total_Vcores columns in Nodes page

Currently, the RM nodes page includes used and available memory/vcore , but it lacks a total column, which is not intuitive enough for users. When the resource capacities of nodes in the cluster vary widely, we may need to sort the nodes to facilitate the comparison of metrics among same types of nodes. Therefore, it is necessary to add columns for total CPU/memory on the nodes page.