aurweb.db: add query, create, delete helpers

Takes sqlalchemy kwargs or stanzas:

query(Model, Model.Column == value)
query(Model, and_(Model.Column == value, Model.Column != "BAD!"))

Updated tests to reflect the new utility and a comment about upcoming
function deprecation is added to get_account_type().

From here on, phase out the use of get_account_type().

+ aurweb.db: Added create utility function
+ aurweb.db: Added delete utility function

The `delete` function can be used to delete a record by search
kwargs directly.

Example:
    delete(User, User.ID == 6)

All three functions added in this commit are typically useful to
perform these operations without having to import aurweb.db.session.
Removes a bit of redundancy overall.

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

test/test_db.py

@@ -3,6 +3,7 @@ import re
 import sqlite3
 import tempfile
 
+from datetime import datetime
 from unittest import mock
 
 import mysql.connector
@@ -11,6 +12,7 @@ import pytest
 import aurweb.config
 
 from aurweb import db
+from aurweb.models.account_type import AccountType
 from aurweb.testing import setup_test_db
 
 
@@ -39,7 +41,7 @@ class DBConnection:
 
 @pytest.fixture(autouse=True)
 def setup_db():
-    setup_test_db()
+    setup_test_db("Bans")
 
 
 def test_sqlalchemy_sqlite_url():
@@ -174,3 +176,12 @@ def test_connection_execute_paramstyle_unsupported():
             "SELECT * FROM AccountTypes WHERE AccountType = ?",
             ["User"]
         ).fetchall()
+
+
+def test_create_delete():
+    db.create(AccountType, AccountType="test")
+    record = db.query(AccountType, AccountType.AccountType == "test").first()
+    assert record is not None
+    db.delete(AccountType, AccountType.AccountType == "test")
+    record = db.query(AccountType, AccountType.AccountType == "test").first()
+    assert record is None