Add Arabic tests for mark ligature component attachments

test/shaping/texts/in-tree/shaper-arabic/script-arabic/misc/diacritics/MANIFEST

@@ -2,5 +2,6 @@ lam-alef.txt
 language-arabic.txt
 language-persian.txt
 language-urdu.txt
+ligature-components.txt
 ligature-diacritics.txt
 mark-skipping.txt

test/shaping/texts/in-tree/shaper-arabic/script-arabic/misc/diacritics/ligature-components.txt

+لّله
+لَّله
+لَّله
+للّه
+للَّه
+للَّه
+للهّ
+للهَّ
+للهَّ
+لّلَه
+لَلّه
+لّلهَ
+لَلهّ
+للّهَ
+للَهّ
+لّلّهَ
+لّلَّه
+لَّلّه