Webhook is not getting triggered when the pipeline is deleted
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### Summary
The webhook is not getting triggered when the pipeline is deleted
### Steps to reproduce
Create webhook for Pipeline Event and go CI/CD -> Pipeline tab.And delete any of the existing pipeline.
### Example Project
Any of the project.
### What is the current *bug* behavior?
webhook is not getting triggered when the pipeline deleted
### What is the expected *correct* behavior?
webhook has to trigger a give your when the pipeline deleted with pipeline Id, Project Id
### Relevant logs and/or screenshots
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as it's tough to read otherwise. -->
### Output of checks
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#### Results of GitLab environment info
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<details>
<summary>Expand for output related to GitLab environment info</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:env:info`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production`)
</pre>
</details>
#### Results of GitLab application Check
<!-- Input any relevant GitLab application check information if needed. -->
<details>
<summary>Expand for output related to the GitLab application check</summary>
<pre>
(For installations with omnibus-gitlab package run and paste the output of:
`sudo gitlab-rake gitlab:check SANITIZE=true`)
(For installations from source run and paste the output of:
`sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true`)
(we will only investigate if the tests are passing)
</pre>
</details>
### Possible fixes
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issue