stdlib: add random package

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

tests/stdlib/docker/run/passphrase/.dagger/env/default/plan/passphrase.cue

@@ -3,6 +3,7 @@ package docker
 import (
 	"dagger.io/docker"
 	"dagger.io/dagger"
+	"dagger.io/random"
 )
 
 key:        dagger.#Secret @dagger(input)
@@ -10,14 +11,16 @@ passphrase: dagger.#Secret @dagger(input)
 user:       string         @dagger(input)
 
 TestRun: {
-	random: #Random & {}
+	suffix: random.#String & {
+		seed: ""
+	}
 
 	run: docker.#Run & {
 		host:         "143.198.64.230"
 		ref:          "nginx:alpine"
 		"user":       user
 		"passphrase": passphrase
-		name:         "daggerci-test-simple-\(random.out)"
+		name:         "daggerci-test-simple-\(suffix.out)"
 		"key":        key
 	}
 }