Minor fixes

The change in SQLiteDatabaseManager wasn't properly saving the
updated internal value.

The check in CacheTenancyBootstrapper wasn't handling that local tests
have a 'testing' environment, not local. However fixing only the
condition would've still added the store to $names which would throw
an exception down the line. We make sure to only throw the exception
in prod, but also make sure to only add the store to $names if it is
supported.

src/Database/TenantDatabaseManagers/SQLiteDatabaseManager.php

@@ -79,6 +79,7 @@ class SQLiteDatabaseManager implements TenantDatabaseManager
 
             $name = '_tenancy_inmemory_' . $tenant->getTenantKey();
             $tenant->setInternal('db_name', "file:$name?mode=memory&cache=shared");
+            $tenant->save();
 
             return true;
         }