Add missing #include <exception> for std::terminate

It was previously included transitively through some other header,
but with recent libc++ versions that's no longer the case.

PiperOrigin-RevId: 517969848
Change-Id: I83c5c1853ae27b64a53a75a0f2faead37a70c145

absl/functional/internal/any_invocable.h

@@ -56,6 +56,7 @@
 #include <cassert>
 #include <cassert>
 #include <cstddef>
 #include <cstddef>
 #include <cstring>
 #include <cstring>
+#include <exception>
 #include <functional>
 #include <functional>
 #include <initializer_list>
 #include <initializer_list>
 #include <memory>
 #include <memory>