chore(wop): fix test for bivariate CRT

- insane degrees generated randomly required insane amounts of memory to
supposedly run the test, now just pretend we did an addition to have higher
degree and keep the spirit of the test

tfhe/src/integer/wopbs/test.rs

@@ -255,12 +255,9 @@ pub fn wopbs_bivariate_crt(params: (ClassicPBSParameters, WopbsParameters)) {
         let mut ct2 = cks.encrypt_crt(clear2, basis.clone());
         //artificially modify the degree
         for (ct_1, ct_2) in ct1.blocks.iter_mut().zip(ct2.blocks.iter_mut()) {
-            let degree = params.0.message_modulus.0
-                * ((rng.gen::<usize>() % (params.0.carry_modulus.0 - 1)) + 1);
-            ct_1.degree = Degree::new(degree);
-            let degree = params.0.message_modulus.0
-                * ((rng.gen::<usize>() % (params.0.carry_modulus.0 - 1)) + 1);
-            ct_2.degree = Degree::new(degree);
+            // Do not go too far otherwise we explode the RAM for larger parameters
+            ct_1.degree = Degree::new(ct_1.degree.get() * 2);
+            ct_1.degree = Degree::new(ct_2.degree.get() * 2);
         }
 
         let ct1 = wopbs_key.keyswitch_to_wopbs_params(&sks, &ct1);