Add `FAIL_AT` macro variant of `FAIL` matching `ADD_FAILURE`, `ADD_FAILURE_AT`

`FAIL_AT` is shorthand for `GTEST_FAIL_AT` like `FAIL` is for `GTEST_FAIL`.

PiperOrigin-RevId: 590393926
Change-Id: I68263af8fa2f98ca0bbef509d475c84e22068018
diff --git a/googletest/include/gtest/gtest.h b/googletest/include/gtest/gtest.h
index a932e68..45400fd 100644
--- a/googletest/include/gtest/gtest.h
+++ b/googletest/include/gtest/gtest.h
@@ -1751,6 +1751,7 @@
 // generic name and clashes with some other libraries.
 #if !(defined(GTEST_DONT_DEFINE_FAIL) && GTEST_DONT_DEFINE_FAIL)
 #define FAIL() GTEST_FAIL()
+#define FAIL_AT(file, line) GTEST_FAIL_AT(file, line)
 #endif
 
 // Generates a success with a generic message.