tests: convert tests to new style

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

tests/compute/dependencies/simple/main.cue

@@ -1,23 +1,21 @@
 package testing
 
+import "alpha.dagger.io/dagger/op"
+
 A: {
 	result: string
 
 	#up: [
-		{
-			do:  "fetch-container"
+		op.#FetchContainer & {
 			ref: "alpine"
 		},
-		{
-			do: "exec"
+		op.#Exec & {
 			args: ["sh", "-c", """
 				echo '{"result": "from A"}' > /tmp/out
 				""",
 			]
-			dir: "/"
 		},
-		{
-			do: "export"
+		op.#Export & {
 			// Source path in the container
 			source: "/tmp/out"
 			format: "json"
@@ -29,12 +27,10 @@ B: {
 	result: string
 
 	#up: [
-		{
-			do:  "fetch-container"
+		op.#FetchContainer & {
 			ref: "alpine"
 		},
-		{
-			do: "exec"
+		op.#Exec & {
 			env: DATA: A.result
 			args: ["sh", "-c", """
 				echo "{\\"result\\": \\"dependency $DATA\\"}" > /tmp/out
@@ -42,8 +38,7 @@ B: {
 			]
 			dir: "/"
 		},
-		{
-			do: "export"
+		op.#Export & {
 			// Source path in the container
 			source: "/tmp/out"
 			format: "json"