GitlabPushTrigger: config triggerOnPush = false and triggerOnAcceptedMergeRequest = true is ignored in Pipeline Jenkins job

### Jenkins and plugins versions report

Environment

```text
Jenkins: 2.387.1
GitLab: v15.9.3-ee
gitlab-plugin: 1.7.8
OS: Linux
Java: 17.0.2 OpenJDK 64-Bit Server VM
```

### What Operating System are you using (both controller, and any agents involved in the problem)?

- Ubuntu 20.04
- Windows agent, version 3071.v7e9b_0dc08466 (Windows 10 Business)

### Reproduction steps

1. Setup Gitlab plugin like [this](https://about.gitlab.com/handbook/customer-success/demo-systems/tutorials/integrations/create-jenkins-pipeline/)
2. Create a Pipeline Jenkins job
3. Use the following config in the pipeline:
```
properties([
gitlabConnection(gitlabConnection: 'connectionName', userAlternativeCredential: true, jobCredentialId: 'credsName'),
pipelineTriggers([
gitlab(triggerOnPush: false, triggerOnMergeRequest: false, triggerOnAcceptedMergeRequest: true, branchFilterType: 'All')
])
])
```
4. **pls pay attention at the following:** triggerOnPush: **false**, triggerOnMergeRequest: **false**, triggerOnAcceptedMergeRequest: **true**
5. Pipeline Jenkins job is triggered on every push event into gitlab repo Merge Request branch

### Expected Results

On gitlab-plugin: 1.6.0 the following config
`gitlab(triggerOnPush: false, triggerOnMergeRequest: false, triggerOnAcceptedMergeRequest: true, branchFilterType: 'All')`

triggered Pipeline Jenkins job on merged Merge Request event only.

### Actual Results

After updating gitlab-plugin from 1.6.0 to 1.7.8 the same config
`gitlab(triggerOnPush: false, triggerOnMergeRequest: false, triggerOnAcceptedMergeRequest: true, branchFilterType: 'All')`

triggers Pipeline Jenkins job on every push event on Merge Request branch

### Anything else?

**Pleas note:** that this issue is not reproducible for Freestyle Jenkins job.

If anything else is needed, please let me know.