signoff!: u64::MulTwoU64sToU128

BREAKING CHANGE: Remove the implementation of `DeprecatedSnippet` for
`u64::mul_two_u64s_to_u128::MulTwoU64sToU128`, implement `BasicSnippet`
directly.

Author: jan-ferdinand

tasm-lib/benchmarks/tasmlib_arithmetic_u64_mul_two_u64s_to_u128_u64.json

@@ -2,21 +2,21 @@
   {
     "name": "tasmlib_arithmetic_u64_mul_two_u64s_to_u128_u64",
     "benchmark_result": {
-      "clock_cycle_count": 35,
+      "clock_cycle_count": 34,
       "hash_table_height": 36,
       "u32_table_height": 133,
-      "op_stack_table_height": 22,
+      "op_stack_table_height": 20,
       "ram_table_height": 0
     },
     "case": "CommonCase"
   },
   {
     "name": "tasmlib_arithmetic_u64_mul_two_u64s_to_u128_u64",
     "benchmark_result": {
-      "clock_cycle_count": 35,
+      "clock_cycle_count": 34,
       "hash_table_height": 36,
       "u32_table_height": 133,
-      "op_stack_table_height": 22,
+      "op_stack_table_height": 20,
       "ram_table_height": 0
     },
     "case": "WorstCase"

tasm-lib/src/arithmetic/u64/and.rs

@@ -95,10 +95,9 @@ pub(crate) mod tests {
         }
 
         fn corner_case_args(&self) -> Vec<Self::Args> {
-            let edge_points = [0, 1 << 32, u64::MAX]
+            let edge_points = [1, 1 << 32, u64::MAX - 1]
                 .into_iter()
-                .flat_map(|p| [p.checked_sub(1), Some(p), p.checked_add(1)])
-                .flatten();
+                .flat_map(|p| [p - 1, p, p + 1]);
 
             edge_points.clone().cartesian_product(edge_points).collect()
         }