Add force flag to delete backend (#6635)

* adding force flag

* add changelog entry

Author: colerogers

CHANGELOG.md

@@ -1,2 +1,3 @@
 - Fixed issue where Auth emulator sign in with Google only shows default tenant. (#6683)
 - Prevent the use of pinTags + minInstances on the same function, as the features are not mutually compatible (#6684)
+- Add force flag to delete backend (#6635).

src/gcp/apphosting.ts

@@ -297,7 +297,7 @@ export async function deleteBackend(
   location: string,
   backendId: string
 ): Promise<Operation> {
-  const name = `projects/${projectId}/locations/${location}/backends/${backendId}`;
+  const name = `projects/${projectId}/locations/${location}/backends/${backendId}?force=true`;
   const res = await client.delete<Operation>(name);
 
   return res.body;