Migrate to is_supervisor being a database field

More efficient, but it does reduce app seperation. Probably not an issue for us!

RIGS/migrations/0044_profile_is_supervisor.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.11 on 2022-01-09 14:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('RIGS', '0043_auto_20211027_1519'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='profile',
+            name='is_supervisor',
+            field=models.BooleanField(default=False),
+        ),
+    ]