[warnings][caffe2] Fix asserts yielding -Wstring-conversion warnings …

…(#72013)

Summary:
Pull Request resolved: pytorch/pytorch#72013

Find and replace `assert(!"` with `assert(false && "`
Excludes headers and paths that contain "third-party" or "external"

Clang raises a `-Wstring-conversion` warning when treating a string as a boolean.  This is not uncommon for asserts though (e.g. `assert(!"should never happen")`).  Clang does permit `expr && "string"` though in order to support these assertion use cases.

Test Plan: ci pass

Differential Revision: D33823092

fbshipit-source-id: 9a1af012215bdc91f8b4162ddb2df28d51539773
(cherry picked from commit 0286910350492eea61050bd9c7d21727b607858c)

torch/csrc/jit/codegen/cuda/codegen.cpp

@@ -315,15 +315,15 @@ class CudaKernelGenerator : private kir::IrVisitor {
   }
 
   void visit(const kir::IterDomain* node) final {
-    TORCH_INTERNAL_ASSERT(!"Unreachable");
+    TORCH_INTERNAL_ASSERT(false && "Unreachable");
   }
 
   void visit(const kir::TensorDomain* node) final {
-    TORCH_INTERNAL_ASSERT(!"Unreachable");
+    TORCH_INTERNAL_ASSERT(false && "Unreachable");
   }
 
   void visit(const kir::TensorView* tv) final {
-    TORCH_INTERNAL_ASSERT(!"Unreachable");
+    TORCH_INTERNAL_ASSERT(false && "Unreachable");
   }
 
   void visit(const kir::UnaryOp* node) final {