Don't copy per version anti features to all versions

make_v0() modified the apps data structure to copy an anti feature for a
specific version to all versions resulting in index-v1 and -v2 to
contain wrong anti feature annotations. This patch fixes this and adds a
test that the data structure is no longer modified.

The bug shadowed bugs in the AF implementation of -v1 and -v2 resulting
in not coping the version specific data. This is corrected as well.
This is also tested now.

For -v2 the AF dict is now sorted to make the result reproducible.

Finally The NoSourceSince AF was added as a per version and overall AF
in -v1 and is now only applied as an overall AF and the test is updated
accordingly.

tests/repo/entry.json

@@ -3,9 +3,9 @@
   "version": 20002,
   "index": {
     "name": "/index-v2.json",
-    "sha256": "da1d651eb7bbc27d2334819c591baa5afb70b01397849de515dade624a96de6d",
+    "sha256": "2f92210a7c7f2f3d855006979ebce4dda203de5ae6596a783aa531f8086e2694",
     "size": 32946,
     "numPackages": 10
   },
   "diffs": {}
-}
+}