feat: hide extra course runs if voucher is applied

[asadali145]

What are the relevant tickets?

Followup on https://github.com/mitodl/mitxpro/pull/2940 due to this comment https://github.com/mitodl/mitxpro/pull/2954#issuecomment-2069371773

Description (What does it do?)

Hide extra course runs if checkout is made through a voucher. We had payment issues with Boeing when vouchers are used to enroll in different runs than the ones in the voucher. This PR hides extra runs from the checkout page when checkout is made through a voucher.

Screenshots (if appropriate):

With Voucher:

Without Voucher:

How can this be tested?

• Set following values in .env

  VOUCHER_DOMESTIC_DATE_KEY=UNIQUE01
  VOUCHER_DOMESTIC_EMPLOYEE_KEY=UNIQUE02
  VOUCHER_DOMESTIC_EMPLOYEE_ID_KEY=UNIQUE03
  VOUCHER_DOMESTIC_KEY=UNIQUE04
  VOUCHER_DOMESTIC_COURSE_KEY=UNIQUE05
  VOUCHER_DOMESTIC_CREDITS_KEY=UNIQUE06
  VOUCHER_DOMESTIC_DATES_KEY=UNIQUE07
  VOUCHER_DOMESTIC_AMOUNT_KEY=UNIQUE08
  VOUCHER_INTERNATIONAL_EMPLOYEE_KEY=UNIQUE09
  VOUCHER_INTERNATIONAL_PROGRAM_KEY=UNIQUE10
  VOUCHER_INTERNATIONAL_COURSE_KEY=UNIQUE11
  VOUCHER_INTERNATIONAL_SCHOOL_KEY=UNIQUE12
  VOUCHER_INTERNATIONAL_EMPLOYEE_ID_KEY=UNIQUE13
  VOUCHER_INTERNATIONAL_AMOUNT_KEY=UNIQUE14
  VOUCHER_INTERNATIONAL_DATES_KEY=UNIQUE15
  VOUCHER_INTERNATIONAL_COURSE_NAME_KEY=UNIQUE16
  VOUCHER_INTERNATIONAL_COURSE_NUMBER_KEY=UNIQUE17
  VOUCHER_COMPANY_ID=1

• Add course, course run, product, and product versions with course id = AMxB and title = Manufacturing for Innovative Design and Production
• Course run start date should be 30th April 2018 (It is mentioned in the voucher that we will test)
• Create another run with a different start date and the product and product version for it.
• go to /ecommerce/admin/coupons as an admin user and choose the following:
  • 'Coupon codes'
  • 'Number of coupon codes': about 10 is probably more than enough
  • Percentage Discount: 100
  • Valid from: today or earlier
  • Course runs: select the course runs of course added in step 2 & 3
  • Company: default company with id=1
• goto boeing/upload/ and upload the file which is located at voucher/.test/domestic_voucher.pdf
• It should find the matching course run
• Clicking on enroll should redirect to the checkout page with the correct product and discount.
• Checkout page should display only the first course run in the select options.
• Now edit the checkout page URL in your browser and remove is_voucher_applied=True& from the URL. Now you should see the 2nd run as well.
• Now set the Course run date to some other date and test the voucher. It should redirect to the resubmit page.