tests: convert tests to new style

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

tests/compute/success/overload/flat/main.cue

@@ -1,17 +1,19 @@
 package testing
 
+import "alpha.dagger.io/dagger/op"
+
 new_prop: "lala"
 #new_def: "lala"
 
 new_prop_too: string
 #new_def_too: string
 
-#up: [{
-	do:  "fetch-container"
-	ref: "busybox"
-},
-	{
-		do: "exec"
+#up: [
+	op.#FetchContainer & {
+		ref: "busybox"
+	},
+	op.#Exec & {
 		args: ["true"]
 		dir: "/"
-	}]
+	},
+]

tests/compute/success/overload/wrapped/main.cue

@@ -1,5 +1,7 @@
 package testing
 
+import "alpha.dagger.io/dagger/op"
+
 foo: {
 	new_prop: "lala"
 	#new_def: "lala"
@@ -7,13 +9,13 @@ foo: {
 	new_prop_too: string
 	#new_def_too: string
 
-	#up: [{
-		do:  "fetch-container"
-		ref: "busybox"
-	},
-		{
-			do: "exec"
+	#up: [
+		op.#FetchContainer & {
+			ref: "busybox"
+		},
+		op.#Exec & {
 			args: ["true"]
 			dir: "/"
-		}]
+		},
+	]
 }