MOAR TESTS

- tests for load
- fixed a few typos in “copy” tests
- provisional tests for mount
- adding a “concurrency” test

Signed-off-by: dubo-dubon-duponey <dubodubonduponey+github@pm.me>

examples/tests/copy/valid/script/main.cue

@@ -11,7 +11,7 @@ test: {
 			},
 			{
 				do: "copy"
-				from: [{do: "fetch-container", ref: "busybox"}]
+				from: [{do: "fetch-container", ref: "alpine"}]
 				src: "/etc/issue"
 				dest: "/"
 			},