Restrict parsed stream quality suffixes (#49869)

* fix: restrict parsed stream quality suffixes

* test: reuse playlist export fixture for quality suffix

tests/__data__/expected/playlist_export/.api/streams.json

@@ -1,15 +1,25 @@
 [
-  {
-    "channel": null,
-    "feed": null,
-    "title": "Daawah TV",
+  {
+    "channel": null,
+    "feed": null,
+    "title": "Daawah TV",
     "url": "http://51.15.246.58:8081/daawahtv/daawahtv2/playlist.m3u8",
     "referrer": null,
     "user_agent": null,
-    "quality": null,
-    "label": null
-  },
-  {
+    "quality": null,
+    "label": null
+  },
+  {
+    "channel": null,
+    "feed": null,
+    "title": "Example (720|)",
+    "url": "https://example.com/live.m3u8",
+    "referrer": null,
+    "user_agent": null,
+    "quality": null,
+    "label": null
+  },
+  {
     "channel": null,
     "feed": null,
     "title": "Andorra TV",
@@ -79,4 +89,4 @@
     "quality": "720p",
     "label": null
   }
-]
+]