Start adjusting acceptance tests to the new Plutus V3 syntax.

examples/acceptance_tests/079/validators/foo.ak

@@ -1,9 +1,9 @@
 validator {
-  fn spend(datum: Int, redeemer: Int, _context: Data) {
+  fn spend(datum: Int, redeemer: Int, _ref: Data, _transaction: Data) {
     datum + redeemer == 42
   }
 
-  fn mint(redeemer: Int, _context: Data) {
+  fn mint(redeemer: Int, _policy: ByteArray, _transaction: Data) {
     redeemer == 42
   }
 }