InteractiveUtils.versioninfo(): print the value of Base.Threads.nthreads() (#43806)

Co-authored-by: Jameson Nash <vtjnash@gmail.com>

Author: DilumAluthge

stdlib/InteractiveUtils/src/InteractiveUtils.jl

@@ -128,7 +128,7 @@ function versioninfo(io::IO=stdout; verbose::Bool=false)
         end
     else
         cpu = Sys.cpu_info()
-        println(io, "  CPU: ", cpu[1].model)
+        println(io, "  CPU: ", length(cpu), " × ", cpu[1].model)
     end
 
     if verbose
@@ -141,6 +141,7 @@ function versioninfo(io::IO=stdout; verbose::Bool=false)
     println(io, "  WORD_SIZE: ", Sys.WORD_SIZE)
     println(io, "  LIBM: ",Base.libm_name)
     println(io, "  LLVM: libLLVM-",Base.libllvm_version," (", Sys.JIT, ", ", Sys.CPU_NAME, ")")
+    println(io, "  Threads: ", Threads.nthreads(), " on ", Sys.CPU_THREADS, " virtual cores")
 
     function is_nonverbose_env(k::String)
         return occursin(r"^JULIA_|^DYLD_|^LD_", k)