tree-wide: Use assert_se() instead of assert() in various places

assert() is compiled away if NDEBUG is set which causes an unused
variable warning in various places when the next commit is applied
so let's use assert_se() to avoid these warnings.

src/shared/tpm2-util.c

@@ -4897,7 +4897,7 @@ static int tpm2_kdfe(
 
         void *end = mempcpy(mempcpy(stpcpy(info, label) + 1, context_u, context_u_size), context_v, context_v_size);
         /* assert we copied exactly the right amount that we allocated */
-        assert(end > info && (uintptr_t) end - (uintptr_t) info == info_len);
+        assert_se(end > info && (uintptr_t) end - (uintptr_t) info == info_len);
 
         _cleanup_free_ void *buf = NULL;
         r = kdf_ss_derive(