Updating UI for Okta config (#35204)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #34539

Figma:
https://www.figma.com/design/OgQ8SyLK8Sw5thXtF1eiNP/-31909-Conditional-access-w--Okta

Requires backend PR https://github.com/fleetdm/fleet/pull/35526 to view
Apple profile.

# Checklist for submitter

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
- [x] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)

## Testing

- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added Okta as a conditional access provider alongside Microsoft Entra
* Users can now configure both identity providers simultaneously or use
either independently
  * Updated configuration interface with new Okta-specific settings
  * Redesigned UI with separate provider cards for improved clarity

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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Co-authored-by: Jacob Shandling <jacob@shandling.dev>

changes/31909-okta-conditional-access

@@ -1 +1,2 @@
-Added integration for Okta conditional access, where Fleet acts as a factor and blocks end users from logging into third-party apps, via Okta, if they are failing specific policies.
+- Added integration for Okta conditional access, where Fleet acts as a factor and blocks end users from logging into third-party apps, via Okta, if they are failing specific policies.
+- Added Okta conditional access configuration to the Fleet UI under Settings -> Integrations -> Conditional access.