metrics: add network devices for overview dashboard (#26799)
metrics: add network devices for overview dashboard (#26799)

 
ngaut/tidb,coocood/tidb,kyle-wang/tidb,ngaut/tidb,pingcap/tidb,ngaut/tidb,c4pt0r/tidb,ngaut/tidb,pingcap/tidb,pingcap/tidb,c4pt0r/tidb,ngaut/tidb,pingcap/tidb,c4pt0r/tidb,coocood/tidb,kyle-wang/tidb,kyle-wang/tidb,pingcap/tidb,pingcap/tidb,c4pt0r/tidb,c4pt0r/tidb,kyle-wang/tidb,kyle-wang/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb