feat: enable soft delete for organizations (#16584)

- Add deleted column to organizations table
- Add trigger to check for existing workspaces, templates, groups and
members in a org before allowing the soft delete

---------

Co-authored-by: Steven Masley <stevenmasley@gmail.com>
Co-authored-by: Steven Masley <Emyrk@users.noreply.github.com>

coderd/idpsync/organization.go

@@ -97,7 +97,10 @@ func (s AGPLIDPSync) SyncOrganizations(ctx context.Context, tx database.Store, u
 		return xerrors.Errorf("organization claims: %w", err)
 	}
 
-	existingOrgs, err := tx.GetOrganizationsByUserID(ctx, user.ID)
+	existingOrgs, err := tx.GetOrganizationsByUserID(ctx, database.GetOrganizationsByUserIDParams{
+		UserID:  user.ID,
+		Deleted: false,
+	})
 	if err != nil {
 		return xerrors.Errorf("failed to get user organizations: %w", err)
 	}