feat: remove block-specific handling from runtime role checks [FC-0026]

[Agrendalath]

Description

The goal of FC-0026 is to remove the XBlock-specific handling from the prepare_runtime_for_user function. This part handles user role checks.
We have the following attributes in the runtime:

1. user_is_staff - this is redundant because x_module.py already contains a shim with the user_is_staff property. We can remove it without any consequences.
2. user_is_admin and user_is_beta_tester - these two are good candidates for the user service, so we can move them there. However, the ora2 XBlock uses these runtime attributes, so we need a compatibility shim in x_module.py. I tried switching ora2 to the user service, but this will require a significant effort (preferably also to the workbench from xblock-sdk), so adding shims is a safer approach at the moment.
3. days_early_for_beta - this variable is already available directly in the XBlock (via the InheritanceMixin), so adding it to the runtime is redundant. However, this runtime attribute is used by the ora2 block, so we can remove it only after merging refactor: use days_early_for_beta from InheritanceMixin instead of runtime [FC-0026] edx-ora2#1977.

Supporting information

Private-ref: BB-7448

Testing instructions

1. Use testing instructions from refactor: use days_early_for_beta from InheritanceMixin instead of runtime [FC-0026] edx-ora2#1977.
2. Check that you can see the .wrapper--staff-toolbar element in LMS when logged in as the edx user.

Other information

We are removing days_early_for_beta from the runtime. Therefore, this should be merged after openedx/edx-ora2#1977.

[openedx-webhooks]

Thanks for the pull request, @Agrendalath!

As a core committer in this repo, you can merge this once the pull request is approved per the core committer reviewer requirements and according to the agreement with your edX Champion.

[Agrendalath]

I moved the initialization of these services directly to the services dict to clarify that they are not used as dependencies elsewhere (e.g., in the wrappers).

[Agrendalath]

I added these shims to maintain backward compatibility. We already have one for user_is_staff, and we don't need one for days_early_for_beta because it's already in the XBlock fields.

[Agrendalath]

@0x29a, @bradenmacdonald, this is ready for review.

[Agrendalath]

There are no block-specific staff users, so passing the course_id is enough.

[bradenmacdonald]

👍

• I tested this: as described on the ORA2 PR.
• I read through the code
• I checked for accessibility issues: n/a
• Includes documentation: requested more comments

[Agrendalath]

@ormsbee, would you like to review this before we merge?

openedx/edx-ora2#1977 should be merged and released tomorrow, so I'll bump the ora2 version then.

[ormsbee]

@Agrendalath: I skimmed through it and I don't see anything that worries me. I don't think I need to review in more detail. Thank you.

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[edx-pipeline-bot]

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[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the staging environment in preparation for a release to production.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.

[edx-pipeline-bot]

EdX Release Notice: This PR has been deployed to the production environment.