games/anki: Update to 2.1.62

* Since release 2.1.55, upstream has changed the build system to a
  homebrew solution written in Rust, which generates the files for
  ninja(1) and then uses the latter also for building.

  As a result, quite a number of patches, that revolved around the
  Bazel build system, can now be removed and the Makefile can also be
  slimmed down considerably.

  By environment variables recognized by the build system, some
  required binaries (e.g. Python, Node.js, etc.) for the build can be
  directly defined instead downloading the binary tarballs from the
  official repositories, which saving quite a bit of patches at
  the end.

  In order to be able to build Anki successfully on FreeBSD, a few
  more environment variables have been introduced via custom patches.
  With this it's possible to use an offline cache for Node.js as well
  as a native Python environment instead of a venv.

* Belatedly add devel/py-orjson as a fixed runtime dependency and
  although it's still optional in the code, the question is how long
  this will be the case.

  Thus update NOT_FOR_ARCH_REASON accordingly and keep ONLY_FOR_ARCH
  unchanged for now.

Changelogs since 2.1.54:

https://changes.ankiweb.net/changes/2.1.60-69.html
https://changes.ankiweb.net/changes/2.1.50-59.html

MFH:		No (feature release)