Enhancement: Make it easier for Jetpack CRM Tags to be added on a Jetpack Contact Form

### Impacted plugin

Jetpack Contact Form

### What

When adding a Jetpack Contract Form, I want the selected options from a Selection Box, Checkbox, etc to be added as Tags connected to the new Jetpack CRM contact (added through this form). To do this, we need to add `jetpackcrm-tags` to the "Unique CSS ID" field as shown here:


### How

Can we make this an easier option - like a selection box that appears when the "Jetpack CRM Integration" toggle is selected for the form?

Start by reviewing the Jetpack Contact Form's "Jetpack CRM Integration" toggle and the "Unique CSS ID" field described in the issue. Determine how a selection box could expose CRM tag assignment for form options, then verify that selected options are added as tags on the new Jetpack CRM contact.

Written by the indexing model from the issue text.