apply tests: use "test_must_fail" instead of ad-hoc pattern

Change a fragile test pattern introduced in 6b763c424e (git-apply: do
not read past the end of buffer, 2007-09-05). Before this we wouldn't
distinguish normal "git apply" failures from segfaults or abort().

I'd previously marked this test as passing under SANITIZE=leak in
f54f48fc07 (leak tests: mark some apply tests as passing with
SANITIZE=leak, 2021-10-31). Let's remove that annotation as this test
will no longer pass.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t4123-apply-shrink.sh

@@ -2,8 +2,6 @@
 
 test_description='apply a patch that is larger than the preimage'
 
-
-TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
 cat >F  <<\EOF
@@ -41,20 +39,8 @@ test_expect_success setup '
 '
 
 test_expect_success 'apply should fail gracefully' '
-
-	if git apply --index patch
-	then
-		echo Oops, should not have succeeded
-		false
-	else
-		status=$? &&
-		echo "Status was $status" &&
-		if test -f .git/index.lock
-		then
-			echo Oops, should not have crashed
-			false
-		fi
-	fi
+	test_must_fail git apply --index patch &&
+	test_path_is_missing .git/index.lock
 '
 
 test_done