Error: Package Metadata Conflict When Recreating a Function with the Same Name

### Search before asking

- [X] I searched in the [issues](https://github.com/apache/pulsar/issues) and found nothing similar.

### Version

Pulsar Version : 2.11.1

### Minimal reproduce step

The issue is related to creating and recreating functions within a development environment. The problem occurs when a function is initially created, subsequently deleted, and an attempt is made to recreate it using the same name. The error message received during the recreation attempt is as follows:

"detail": "code: 500, message: {"reason":"Package 'function://orgGroup1/org1tets1/licenseplate@0' metadata already exists"}, serviceUrl: http://standalone:8080/admin/v3/functions/orgGroup1/org1tets1/licenseplate"

### What did you expect to see?

Function creation should be successful.

### What did you see instead?

"detail": "code: 500, message: {"reason":"Package 'function://orgGroup1/org1tets1/licenseplate@0' metadata already exists"}, serviceUrl: http://standalone:8080/admin/v3/functions/orgGroup1/org1tets1/licenseplate"

### Anything else?

_No response_

### Are you willing to submit a PR?

- [ ] I'm willing to submit a PR!

Start by reproducing the create, delete, and recreate sequence for the function named licenseplate on Pulsar 2.11.1, using the reported service URL and metadata-conflict response. Trace the function package metadata cleanup and recreation entry points, then verify that recreating the same function name succeeds without an existing-metadata error.

Written by the indexing model from the issue text.