Allow team admins to require two-factor authentication (#4034)

* Allow team admins to require two-factor authentication

* Add API tests

* Improve logic

* ADd button tooltip

src/pretix/base/migrations/0259_team_require_2fa.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.10 on 2024-04-02 11:21
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0258_uniq_indx"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="team",
+            name="require_2fa",
+            field=models.BooleanField(default=False),
+        ),
+    ]