Add VariableTracker.debug_repr (#126299)

Summary:
Now you can print arbitrary values at compile time with
comptime.print()

Signed-off-by: Edward Z. Yang <[email protected]>

X-link: pytorch/pytorch#126299
Approved by: https://github.com/jansel
ghstack dependencies: #126292

Reviewed By: huydhn

Differential Revision: D57421156

Pulled By: ezyang

fbshipit-source-id: a75045a564722baa243b1381a324bc9f6c061ff1

Author: ezyang

userbenchmark/dynamo/dynamobench/_dynamo/utils.py

@@ -2642,3 +2642,11 @@ def get_locals_to_steal(maybe_gm):
 
 def set_locals_to_steal(gm, locals_to_steal):
     gm.meta["locals_to_steal"] = locals_to_steal
+
+
+class Lit:
+    def __init__(self, s):
+        self.s = s
+
+    def __repr__(self):
+        return self.s