home-assistant-component-tests.stream: disable failing test

This test crashes the python interpreter in libx265_encode_stream:

```
 #0  0x00007feefe2a7a7e in free () from /nix/store/81mi7m3k3wsiz9rrrg636sx21psj20hc-glibc-2.40-66/lib/libc.so.6
 No symbol table info available.
 #1  0x00007fee98059295 in av_free (ptr=<optimized out>) at libavutil/mem.c:243
 No locals.
 #2  0x00007fee98059352 in av_freep (arg=<optimized out>) at libavutil/mem.c:253
        val = <optimized out>
 #3  0x00007fee997a4713 in libx265_encode_frame (avctx=<optimized out>, pkt=<optimized out>, pic=<optimized out>,
    got_packet=0x7ffe35c7e3f4) at libavcodec/libx265.c:821
    [...]
 #4  0x00007fee99526ff6 in ff_encode_encode_cb (avctx=avctx@entry=0x16d1f00, avpkt=avpkt@entry=0x16ad440, frame=0x16f5e80, got_packet=got_packet@entry=0x7ffe35c7e3f4) at libavcodec/encode.c:254
        codec = 0x7fee9a25e5c0 <ff_libx265_encoder>
 [...]
```

pkgs/servers/home-assistant/tests.nix

@@ -67,6 +67,10 @@ let
       # tries to retrieve file from github
       "test_non_text_stdout_capture"
     ];
+    stream = [
+      # crashes with x265>=4.0
+      "test_h265_video_is_hvc1"
+    ];
     websocket_api = [
       # AssertionError: assert 'unknown_error' == 'template_error'
       "test_render_template_with_timeout"