Zabbix integration broken with Zabbix 7.0+

[anothermerge]

Hi, at some point the login for the api changed from user to username. This needs to be updated in your check at https://github.com/DataDog/integrations-extras/blob/master/zabbix/datadog_checks/zabbix/check.py on line 35 I believe. It should look like the below to work:

'params': {'username': zabbix_user, 'password': zabbix_pass},

Thanks

[alaodd]

@KosukeKamiya , we have another customer with a similar issue. Please review and update this code.

[KosukeKamiya]

Unfortunately, I can no longer maintain the Zabbix integration due to my current circumstances.

If the necessary code updates are clear, could you please create a pull request and/or inform Datadog Support? I believe Datadog will assist on a best-effort basis.

@DataDog/integrations-extras @DataDog/integrations-core
Could you please help me find a new maintainer for the Zabbix integration or mark it as orphaned?