Dev serialization (#64)

* Added compressed serialization for GLWECiphertext + Ciphertext decompression

* Added compressed serialization for GGLWECiphertext & GLWESwitchingkey

* generalized automorphism test

* Removed ops on scalar_znx, replaced by as_vec_znx/as_vec_znx_mut and then call op on vec_znx

* Added tests for automorphism key encryption

* Added tensorkey compressed

* added ggsw compressed

backend/src/implementation/cpu_spqlios/vec_znx.rs

@@ -37,7 +37,7 @@ where
     B: CPUAVX,
 {
     fn vec_znx_alloc_impl(n: usize, cols: usize, size: usize) -> VecZnxOwned {
-        VecZnxOwned::new::<i64>(n, cols, size)
+        VecZnxOwned::alloc::<i64>(n, cols, size)
     }
 }