Can't install libtorrent==2.0.7 dependency on MacOS (aarch64)

@shyba is already working on this.

Since Sep 20, 2022.

This poses a problem for making the transition to native aarch64 python3.9. I don't know why it doesn't try to get libtorrent sources and compile in this case.

```
uname -a
Darwin Jonathans-Mac-mini.local 21.6.0 Darwin Kernel Version 21.6.0: Wed Aug 10 14:28:35 PDT 2022; root:xnu-8020.141.5~2/RELEASE_ARM64_T8101 arm64

(lbry-venv-3.9) swdev1@Jonathans-Mac-mini lbry-sdk % pip install -e .
Obtaining file:///Users/swdev1/lbry-sdk
Preparing metadata (setup.py) ... done
Requirement already satisfied: aiohttp==3.7.4 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (3.7.4)
Requirement already satisfied: aioupnp==0.0.18 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (0.0.18)
Requirement already satisfied: appdirs==1.4.3 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.4.3)
Requirement already satisfied: certifi>=2021.10.08 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (2022.5.18.1)
Requirement already satisfied: colorama==0.3.7 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (0.3.7)
Requirement already satisfied: distro==1.4.0 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.4.0)
Requirement already satisfied: base58==1.0.0 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.0.0)
Requirement already satisfied: cffi==1.13.2 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.13.2)
Collecting cryptography==2.5
Using cached cryptography-2.5.tar.gz (487 kB)
Installing build dependencies ... done
Getting requirements to build wheel ... done
Preparing metadata (pyproject.toml) ... done
Requirement already satisfied: protobuf==3.17.2 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (3.17.2)
Requirement already satisfied: prometheus_client==0.7.1 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (0.7.1)
Requirement already satisfied: ecdsa==0.13.3 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (0.13.3)
Requirement already satisfied: pyyaml==5.3.1 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (5.3.1)
Requirement already satisfied: docopt==0.6.2 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (0.6.2)
Requirement already satisfied: hachoir==3.1.2 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (3.1.2)
Requirement already satisfied: coincurve==15.0.0 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (15.0.0)
Requirement already satisfied: pbkdf2==1.3 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.3)
Requirement already satisfied: filetype==1.0.9 in ./lbry-venv-3.9/lib/python3.9/site-packages (from lbry==0.110.0) (1.0.9)
ERROR: Could not find a version that satisfies the requirement libtorrent==2.0.7 (from lbry) (from versions: none)
ERROR: No matching distribution found for libtorrent==2.0.7
WARNING: You are using pip version 22.0.4; however, version 22.2.2 is available.
You should consider upgrading via the '/Users/swdev1/lbry-sdk/lbry-venv-3.9/bin/python3.9 -m pip install --upgrade pip' command.
```

I have an old libtorrent installed from the time I was using python3.7 x86_64 architecture (emulated). I think I was getting away with running tests before because libtorrent was not required to run the tests I wanted to run. But it's required after https://github.com/lbryio/lbry-sdk/commit/5be990fc55fd717f1bb29b5ae54dfcb6f0fe48e3

```
(lbry-venv-3.9) swdev1@Jonathans-Mac-mini lbry-sdk % env ENABLE_LEGACY_SEARCH=1 python -m unittest -vv -k test_single_server_payment tests/integration/blockchain/test_wallet_server_sessions.py
test_wallet_server_sessions (unittest.loader._FailedTest) ... ERROR

======================================================================
ERROR: test_wallet_server_sessions (unittest.loader._FailedTest)
----------------------------------------------------------------------
ImportError: Failed to import test module: test_wallet_server_sessions
Traceback (most recent call last):
File "/opt/homebrew/Cellar/python@3.9/3.9.13_2/Frameworks/Python.framework/Versions/3.9/lib/python3.9/unittest/loader.py", line 154, in loadTestsFromName
module = __import__(module_name)
File "/Users/swdev1/lbry-sdk/tests/integration/blockchain/test_wallet_server_sessions.py", line 9, in
from lbry.testcase import IntegrationTestCase, CommandTestCase
File "/Users/swdev1/lbry-sdk/lbry/testcase.py", line 25, in
from lbry.extras.daemon.daemon import Daemon, jsonrpc_dumps_pretty
File "/Users/swdev1/lbry-sdk/lbry/extras/daemon/daemon.py", line 46, in
from lbry.extras.daemon.components import WALLET_COMPONENT, DATABASE_COMPONENT, DHT_COMPONENT, BLOB_COMPONENT
File "/Users/swdev1/lbry-sdk/lbry/extras/daemon/components.py", line 31, in
from lbry.torrent.session import TorrentSession
File "/Users/swdev1/lbry-sdk/lbry/torrent/session.py", line 10, in
import libtorrent
ImportError: dlopen(/Users/swdev1/lbry-sdk/lbry-venv-3.9/lib/python3.9/site-packages/libtorrent.so, 0x0002): tried: '/Users/swdev1/lbry-sdk/lbry-venv-3.9/lib/python3.9/site-packages/libtorrent.so' (not a mach-o file)
```