Implement structural stock locations (#3949)

* Implement structural stock locations

* Bumped API version

InvenTree/stock/migrations/0090_stocklocation_structural.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.2.16 on 2022-11-18 15:49
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0089_alter_stockitem_purchase_price'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='stocklocation',
+            name='structural',
+            field=models.BooleanField(default=False, help_text="Stock items may not be directly located into a structural stock locations, but may be located to it's child locations.", verbose_name='Structural'),
+        ),
+    ]