OpsGenie Integration - alerts are not being acknowledged

### Environment

SaaS (https://sentry.io/)

### Steps to Reproduce

1. Trigger an issue with OpsGenie integration enabled
2. See the alert created on OpsGenie with the Alias being `"sentry: {ISSUE_ID}"`
3. Resolve the issue on Sentry

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It might be because you seem to be using two different aliases in your integration:
1. `sentry: {ISSUE_ID}`, see [/src/sentry/integrations/opsgenie/client.py](https://github.com/getsentry/sentry/blob/4af7bd123d08eea9e1961c87b860551faeca9be5/src/sentry/integrations/opsgenie/client.py#L73)
2. `incident_{ORGANISATION_ID}_{ISSUE_ID}`, see [/src/sentry/integrations/opsgenie/utils.py](https://github.com/getsentry/sentry/blob/4af7bd123d08eea9e1961c87b860551faeca9be5/src/sentry/integrations/opsgenie/utils.py#L29)

### Expected Result

1. The alert should be acknowledged on OpsGenie

### Actual Result

1. The alert is not acknowledged on OpsGenie.

### Product Area

Settings - Integrations

### Link

- issue [#74256](https://github.com/getsentry/sentry/issues/74256)
- issue [#62261](https://github.com/getsentry/sentry/issues/62261)