Add engine internal error macro mjERROR to prepend calling function to error function.

PiperOrigin-RevId: 541584847
Change-Id: I57447e64375413ee07aa96372a402e1ced59ff4a

python/mujoco/bindings_test.py

@@ -926,7 +926,8 @@ Euler integrator, semi-implicit in velocity.
 
   def test_can_raise_error(self):
     self.data.pstack = self.data.nstack
-    with self.assertRaisesRegex(mujoco.FatalError, r'\Astack overflow'):
+    with self.assertRaisesRegex(mujoco.FatalError,
+                                r'\Amj_stackAlloc: stack overflow'):
       mujoco.mj_forward(self.model, self.data)
 
   def test_mjcb_time(self):

python/mujoco/rollout_test.py

@@ -369,8 +369,8 @@ class MuJoCoRolloutTest(parameterized.TestCase):
     ctrl = np.zeros((3, model.nu))
 
     model.opt.solver = 10  # invalid solver type
-    with self.assertRaisesWithLiteralMatch(mujoco.FatalError,
-                                           'Unknown solver type 10'):
+    with self.assertRaisesWithLiteralMatch(
+        mujoco.FatalError, 'mj_fwdConstraint: unknown solver type 10'):
       state, sensordata = rollout.rollout(model, data, initial_state, ctrl)
 
   def test_invalid(self):