Improve the state matching in E2E tests

[Wwwsylvia]

In E2E testing, currently we can only match the top-level command like cp, pull, push, but we are not able to match sub commands like manifest push, manifest fetch, etc. We should improve the status matcher to match the full commands.

oras/test/e2e/internal/utils/match/status.go

Lines 57 to 84 in 6874885

	func newStateMachine(cmd string) *stateMachine {
	sm := &stateMachine{
	start: newState(),
	end: newState(),
	edges: make(map[string][]edge),
	}
	// prepare edges
	switch cmd {
	case "push", "attach":
	sm.addPath("Uploading", "Uploaded")
	sm.addPath("Exists")
	sm.addPath("Skipped")
	case "pull":
	sm.addPath("Downloading", "Downloaded")
	sm.addPath("Downloading", "Processing", "Downloaded")
	sm.addPath("Skipped")
	sm.addPath("Restored")
	case "copy", "cp":
	sm.addPath("Copying", "Copied")
	sm.addPath("Skipped")
	sm.addPath("Exists")
	sm.addPath("Mounted")
	default:
	ginkgo.Fail("Unrecognized cmd name " + cmd)
	}
	return sm
	}