refactor: use days_early_for_beta from InheritanceMixin instead of runtime [FC-0026]

[Agrendalath]

TL;DR - Use the block's property directly instead of getting it from the runtime.

What changed?

FC-0026 removes the block-specific handling from the runtime. In openedx/openedx-platform#32356, we are simplifying user checks. prepare_runtime_for_user adds the days_early_for_beta attribute to the runtime, but this value is already provided by the InheritanceMixin. We are removing this redundancy, so this makes ora2 retrieve the value directly from XBlock fields.

This also updates the PR template and the release process doc, as they were slightly outdated.

Developer Checklist

• Reviewed the release process
• Translations and JS/SASS compiled: n/a
• Bumped version number in openassessment/__init__.py and package.json

Testing Instructions

1. Go to the Course Advanced Settings and set Days Early for Beta Users to 6000.
2. Create an ORA2 XBlock. Go to Edit -> SCHEDULE and set its start dates to 2030.
3. Go to the Instructor Dashboard -> Membership and enroll audit as a beta tester.
4. Visit LMS as the audit user and check that you can submit the solution.

Supporting information

Private-ref: BB-7448

Reviewer Checklist

Collectively, these should be completed by reviewers of this PR:

• I've done a visual code review
• I've tested the new functionality

FYI: @openedx/content-aurora

[openedx-webhooks]

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Feel free to add as much of the following information to the ticket as you can:

• supporting documentation
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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.01 ⚠️

Comparison is base (7912a81) 94.98% compared to head (f05e193) 94.98%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1977      +/-   ##
==========================================
- Coverage   94.98%   94.98%   -0.01%     
==========================================
  Files         154      154              
  Lines       17045    17044       -1     
  Branches     1611     1610       -1     
==========================================
- Hits        16190    16189       -1     
  Misses        641      641              
  Partials      214      214              

Flag	Coverage Δ
unittests	94.98% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
openassessment/xblock/test/test_staff.py	99.51% <ø> (ø)
openassessment/xblock/test/test_staff_area.py	99.85% <ø> (ø)
openassessment/__init__.py	100.00% <100.00%> (ø)
openassessment/xblock/openassessmentblock.py	90.68% <100.00%> (-0.05%)	⬇️
openassessment/xblock/test/test_openassessment.py	100.00% <100.00%> (ø)

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[Agrendalath]

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

@pomegranited, would you like to review this as CC?

[bradenmacdonald]

Looks good from a quick look, but I'll let others do the bulk of the review here. I'm not a CC for this repo.

[pomegranited]

@Agrendalath Sure thing, I'll review it this week.

[pomegranited]

👍 Works great, thank you @Agrendalath !

I'll merge this tomorrow if there's no objections from anyone on #cc-core-applications.

• I tested this on my devstack using the PR test instructions
• I read through the code
• I checked for accessibility issues N/A -- backend changes only
• Includes documentation -- +💯 for updating the erroneous links in the .github templates!
• Commit structure follows OEP-0051

[openedx-webhooks]

@Agrendalath 🎉 Your pull request was merged! Please take a moment to answer a two question survey so we can improve your experience in the future.

[pomegranited]

Merged and tagged: v5.0.3, and it's been pushed to pypi.

@leangseu-edx since you did the last one, do you know if the releases are created automatically, or do I need to draft one manually? Please disregard -- it's been a while since the release was tagged, so I went ahead and created it: https://github.com/openedx/edx-ora2/releases/tag/v5.0.3

[Agrendalath]

Thank you, @pomegranited!