Enhance load-error event handling for ZuoraSimple Component

What does this MR do and why?

Improves load-error event handling for Zuora component

Resolves #362468 (closed)

Screenshots or screen recordings

Scenario	Before	After
[Identity verification] Zuora script load failure
[Identity verification] Zuora configuration issue
[Account validation] Zuora script load failure
[Account validation] Zuora configuration issue

Identity verification	Account validation
Successful load (as before)

How to set up and validate locally

Identity verification

1. Ensure that you have a running CustomersDot installation locally and Zuora is set up to use GL.com CC Validation_registration hosted page with the correct callback to your local GDK instance

2. Enable arkose_labs_signup_challenge feature. This feature is responsible for interfacing with Arkose Labs to assign a risk_band for new users.

   $ rails console
   > Feature.enable(:arkose_labs_signup_challenge)
   > ApplicationSetting.first.update({ arkose_labs_public_api_key: '****', arkose_labs_private_api_key: '****', arkose_labs_namespace: 'client' })

   Credentials are available in GitLab 1Password Engineering Vault

3. Set require_admin_approval_after_user_signup to false so user can sign in without needing admin approval

   $ rails console
   > ApplicationSetting.first.update(require_admin_approval_after_user_signup: false)

4. Enable feature flags for identity verification

   $ rails console
   > Feature.enable(:identity_verification)
   > Feature.enable(:identity_verification_credit_card)

5. Sign up for a new account. After, you should be redirected to the Identity Verification page (http://localhost:3000/users/identity_verification)

6. Update the user's (the same user you created previously) risk band data to have 'High' value

   $ rails console
   > u = User.last
   > risk_band = u.custom_attributes.by_key('arkose_risk_band').first
   > risk_band.update(value: 'High')

7. Refresh the Identity Verification page

Account validation:

Follow these steps to setup and verify locally

MR acceptance checklist

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