Allow selecting GLPI itemtype when importing mobile devices

[cconard96]

Checklist before requesting a review

• I have performed a self-review of my code.
• I have added tests (when available) that prove my fix is effective or that my feature works.
• I have updated the CHANGELOG with a short functional description of the fix or new feature.

Description

This was a feature that was promised in the early days of this plugin but seems to have been forgotten/accidentally removed when I focused on bringing "smart phone" features to GLPI itself. I am reviving the feature based on a community request on the forum and also to later support custom asset types coming in GLPI 11.

[stonebuzz]

I will not be able to review or validate this PR at the moment. We have just gained partner access with JAMF, but I still do not have access to the data.

[cconard96]

I will not be able to review or validate this PR at the moment. We have just gained partner access with JAMF, but I still do not have access to the data.

I saw that the partner access was progressing, but wasn't aware of the status of the Jamf Pro instance access. I am asking the person that asked about it on the forum if they could test this too.

[cconard96]

I have some feedback from the user and I at least still need to adjust the configuration options in this PR. Right now you can select a default Computer/Phone Type for each device type in the plugin options but it doesn't account for multiple possible GLPI asset types.