[Bounds-Safety][NFC] Clean up leading space emission for CountAttributedType (#87582)

Previously the leading space was added in each string constant. This
patch moves the leading space out of the string constants and is instead
explicitly added to add clarity to the code.

Author: delcypher

clang/lib/AST/TypePrinter.cpp

@@ -1746,14 +1746,15 @@ void TypePrinter::printPackExpansionAfter(const PackExpansionType *T,
 static void printCountAttributedImpl(const CountAttributedType *T,
                                      raw_ostream &OS,
                                      const PrintingPolicy &Policy) {
+  OS << ' ';
   if (T->isCountInBytes() && T->isOrNull())
-    OS << " __sized_by_or_null(";
+    OS << "__sized_by_or_null(";
   else if (T->isCountInBytes())
-    OS << " __sized_by(";
+    OS << "__sized_by(";
   else if (T->isOrNull())
-    OS << " __counted_by_or_null(";
+    OS << "__counted_by_or_null(";
   else
-    OS << " __counted_by(";
+    OS << "__counted_by(";
   if (T->getCountExpr())
     T->getCountExpr()->printPretty(OS, nullptr, Policy);
   OS << ')';