change(aurweb): add parallel tests and improve aurweb.db

This change utilizes pytest-xdist to perform a multiproc test
run and reworks aurweb.db's code. We no longer use a global
engine, session or Session, but we now use a memo of engines
and sessions as they are requested, based on the PYTEST_CURRENT_TEST
environment variable, which is available during testing.

Additionally, this change strips several SQLite components
out of the Python code-base.

SQLite is still compatible with PHP and sharness tests, but
not with our FastAPI implementation.

More changes:
------------
- Remove use of aurweb.db.session global in other code.
- Use new aurweb.db.name() dynamic db name function in env.py.
- Added 'addopts' to pytest.ini which utilizes multiprocessing.
    - Highly recommended to leave this be or modify `-n auto` to
      `-n {cpu_threads}` where cpu_threads is at least 2.

Signed-off-by: Kevin Morris <kevr@0cost.org>

test/test_ssh_pub_key.py

@@ -1,10 +1,9 @@
 import pytest
 
 from aurweb import db
-from aurweb.models.account_type import AccountType
+from aurweb.models.account_type import USER_ID
 from aurweb.models.ssh_pub_key import SSHPubKey, get_fingerprint
 from aurweb.models.user import User
-from aurweb.testing import setup_test_db
 
 TEST_SSH_PUBKEY = """
 ssh-rsa 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 kevr@volcano
@@ -14,21 +13,16 @@ user = ssh_pub_key = None
 
 
 @pytest.fixture(autouse=True)
-def setup():
+def setup(db_test):
     global user, ssh_pub_key
 
-    setup_test_db("Users", "SSHPubKeys")
-
-    account_type = db.query(AccountType,
-                            AccountType.AccountType == "User").first()
     with db.begin():
         user = db.create(User, Username="test", Email="test@example.org",
                          RealName="Test User", Passwd="testPassword",
-                         AccountType=account_type)
+                         AccountTypeID=USER_ID)
 
     with db.begin():
-        ssh_pub_key = db.create(SSHPubKey,
-                                UserID=user.ID,
+        ssh_pub_key = db.create(SSHPubKey, UserID=user.ID,
                                 Fingerprint="testFingerprint",
                                 PubKey="testPubKey")