Make wp job manager taxonomies available to other plugins like normal Wrdpress taxonomies

### Is your feature request related to a problem? Please describe
The taxonomies created by WP Job Manager do not behave like taxonomies created by other plugins such as Woocommerce or CPTUI / JetEngine etc... Normally, taxonomies are available to be used by other plugins such as page builders and Fakerpress but the WP Job Manager ones such as Job Category and Job Type are not.

### Describe the solution you'd like
When using third party plugins, (I shall use Fakerpress here as an example), the WP Job Manager taxonomies should be available to be used when generating content. Currently the default Wordpress categories and tags are available, and after installing Woocommerce the product tags and categories and shipping classes are available too. Also all of my other custom taxonomies I have created are available. The WP Job Manager Job Type and Job Categories should also be selectable.

I should add that I have installed the Job Tags add-on and the Job Tags taxonomy IS available.

### Additional context
Here's the available taxonomies when generating content using Fakerpress

Start by locating where WP Job Manager registers the Job Type and Job Category taxonomies, then compare their registration with the Job Tags add-on mentioned in the issue. Check how the resulting taxonomies are exposed to third-party content-generation tools, and consider the work done when both taxonomies are selectable like the other listed taxonomies.

Written by the indexing model from the issue text.