[warnings][caffe2] Fix asserts yielding -Wstring-conversion warnings (#72013)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/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)
