Fixed integration test

1. Fix ArduinoIoTCloud version to 2.4.1 (the latest versions have fewer
   files and do not trigger the objs.a creation)
2. Merge two parallel tests because they actually need to be performed
   sequentially since we are checking that the compiled artifacts on
   the former are reused on the latter.

Author: cmaglie

Diff for: internal/integrationtest/compile_1/compile_test.go

@@ -850,7 +850,9 @@ func TestCompileWithArchivesAndLongPaths(t *testing.T) {
 	require.NoError(t, err)
 
 	// Install test library
-	_, _, err = cli.Run("lib", "install", "ArduinoIoTCloud", "--config-file", "arduino-cli.yaml")
+	// (We must use [email protected] because it has a folder with a lot of files
+	// that will trigger the creation of an objs.a archive)
+	_, _, err = cli.Run("lib", "install", "[email protected]", "--config-file", "arduino-cli.yaml")
 	require.NoError(t, err)
 
 	stdout, _, err := cli.Run("lib", "examples", "ArduinoIoTCloud", "--json", "--config-file", "arduino-cli.yaml")
@@ -859,12 +861,10 @@ func TestCompileWithArchivesAndLongPaths(t *testing.T) {
 	sketchPath := paths.New(libOutput)
 	sketchPath = sketchPath.Join("examples", "ArduinoIoTCloud-Advanced")
 
-	t.Run("Compile", func(t *testing.T) {
+	t.Run("CheckCachingOfFolderArchives", func(t *testing.T) {
 		_, _, err = cli.Run("compile", "-b", "esp8266:esp8266:huzzah", sketchPath.String(), "--config-file", "arduino-cli.yaml")
 		require.NoError(t, err)
-	})
 
-	t.Run("CheckCachingOfFolderArchives", func(t *testing.T) {
 		// Run compile again and check if the archive is re-used (cached)
 		out, _, err := cli.Run("compile", "-b", "esp8266:esp8266:huzzah", sketchPath.String(), "--config-file", "arduino-cli.yaml", "-v")
 		require.NoError(t, err)