Excluded analytix/js/cta_forms from requirejs build

[orangejenny]

Technical Summary

This is followup for #35729

The import statement added to cta_forms.js here breaks requirejs's parser. That file, as part of analytics, is in the base_main bundle, even though it's only needed on pre-login pages where the demo button is displayed.

This PR tells requirejs to ignore that file when bundling. There's probably some minor performance implication to this, but we only have ~10 pages left on requirejs, so I'm not concerned.

Safety Assurance

Safety story

This change primarily affects the deploy process. I've deployed to staging and tested that the signup workflow with the telephone widget still works properly, and I've smoke tested that the "Current Subscription" page (one of the few remaining requirejs pages) loads without doing anything wonky.

Automated test coverage

no

QA Plan

no

Rollback instructions

• This PR can be reverted after deploy with no further considerations

Labels & Review

• Risk label is set correctly
• The set of people pinged as reviewers is appropriate for the level of risk of the change