Fix overload resolution for pragmas evaluation (#8902)

Fixes #6448
Fixes #4384

tests/macros/tmsginfo.nim

@@ -1,6 +1,6 @@
 discard """
   nimout: '''tmsginfo.nim(21, 1) Warning: foo1 [User]
-tmsginfo.nim(22, 11) template/generic instantiation from here
+tmsginfo.nim(22, 13) template/generic instantiation from here
 tmsginfo.nim(15, 10) Warning: foo2 [User]
 tmsginfo.nim(23, 1) Hint: foo3 [User]
 tmsginfo.nim(19, 7) Hint: foo4 [User]

tests/pragmas/foobar.nim

@@ -0,0 +1,3 @@
+import macros
+macro async*(body: untyped): untyped =
+  return newStmtList()

tests/pragmas/t4384.nim

@@ -0,0 +1,3 @@
+macro testMacro(body: untyped): untyped = discard
+macro testMacro(s: string, body: untyped): untyped = discard
+proc foo() {.testMacro: "foo".} = discard

tests/pragmas/t6448.nim

@@ -0,0 +1,16 @@
+discard """
+  line: 9
+  errormsg: '''ambiguous call; both foobar.async'''
+"""
+
+import foobar
+import asyncdispatch, macros
+
+proc bar() {.async.} =
+  echo 42
+
+proc foo() {.async.} = 
+  await bar()
+
+asyncCheck foo()
+runForever()