Add uptime to CI test info (#59107)

Author: IanButterworth

test/runtests.jl

@@ -135,6 +135,7 @@ cd(@__DIR__) do
           Sys.CPU_THREADS = $(Sys.CPU_THREADS)
           Sys.total_memory() = $(Base.format_bytes(Sys.total_memory()))
           Sys.free_memory() = $(Base.format_bytes(Sys.free_memory()))
+          Sys.uptime() = $(Sys.uptime()) ($(round(Sys.uptime() / (60 * 60), digits=1)) hours)
         """)
 
     #pretty print the information about gc and mem usage