revives: Move typetraits.$ to system. Fixes #5827 (#10071)

* Move typetraits.`$` to system. Fixes #5827.
* revive PR; adjust code to make sure everything works and add tests
* fix tests/concepts/tstackconcept.nim
* address comments

tests/system/tsystem_misc.nim

@@ -30,6 +30,20 @@ discard """
 '''
 """
 
+
+block:
+  const a2 = $(int)
+  const a3 = $int
+  doAssert a2 == "int"
+  doAssert a3 == "int"
+
+  proc fun[T: typedesc](t: T) =
+    const a2 = $(t)
+    const a3 = $t
+    doAssert a2 == "int"
+    doAssert a3 == "int"
+  fun(int)
+
 # check high/low implementations
 doAssert high(int) > low(int)
 doAssert high(int8) > low(int8)