tests: move llb tests into tests/llb

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

tests/llb/load/valid/component/main.cue

@@ -0,0 +1,53 @@
+package testing
+
+component: #compute: [{
+	do:  "fetch-container"
+	ref: "alpine"
+}, {
+	do: "exec"
+	args: ["sh", "-c", """
+		printf lol > /id
+		"""]
+	dir: "/"
+}]
+
+test1: {
+	string
+
+	#compute: [
+		{
+			do:   "load"
+			from: component
+		},
+		{
+			do:     "export"
+			source: "/id"
+			format: "string"
+		},
+	]
+}
+
+test2: {
+	string
+
+	#compute: [
+		{
+			do: "load"
+			from: #compute: [{
+				do:  "fetch-container"
+				ref: "alpine"
+			}, {
+				do: "exec"
+				args: ["sh", "-c", """
+					printf lol > /id
+					"""]
+				dir: "/"
+			}]
+		},
+		{
+			do:     "export"
+			source: "/id"
+			format: "string"
+		},
+	]
+}