tests: move compute tests away

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

tests/core/compute/success/exec-nocache/main.cue

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"alpha.dagger.io/alpine"
+	"alpha.dagger.io/dagger/op"
+)
+
+rand: {
+	string
+
+	#up: [
+		op.#Load & {from: alpine.#Image},
+		op.#Exec & {
+			always: true
+			args: ["sh", "-c", """
+				tr -dc A-Za-z0-9 </dev/urandom | head -c 13 > /id
+				"""]
+		},
+		op.#Export & {source: "/id"},
+	]
+}
+
+// If rand is executed twice, cue won't validate
+ref1: rand
+ref2: ref1