Fix student progress reset not working in some cases

[m1r0]

Resolves #7175

Proposed Changes

Fix the progress reset by preventing a redirect from happening during the REST API call.

Testing Instructions

1. Create a course with a lesson and a quiz.
2. Submit the quiz and complete the course.
3. Go to the admin panel -> Sensei LMS -> Students
4. Reset the course progress.
5. These should be no error and the progress should be reset.

Pre-Merge Checklist

• PR title and description contain sufficient detail and accurately describe the changes
• Acceptance criteria is met
• Decisions are publicly documented
• Adheres to coding standards (PHP, JavaScript, CSS, HTML)
• All strings are translatable (without concatenation, handles plurals)
• Follows our naming conventions (P6rkRX-4oA-p2)
• Hooks (p6rkRX-1uS-p2) and functions are documented
• New UIs are responsive and use a mobile-first approach
• New UIs match the designs
• Different user privileges (admin, teacher, subscriber) are tested as appropriate
• Code is tested on the minimum supported PHP and WordPress versions
• User interface changes have been tested on the latest versions of Chrome, Firefox and Safari
• "Needs Documentation" label is added if this change requires updates to documentation
• Known issues are created as new GitHub issues

[codecov]

Codecov Report

Merging #7181 (f8a80d0) into trunk (d4e94b4) will decrease coverage by 0.01%.
Report is 37 commits behind head on trunk.
The diff coverage is 77.77%.

@@             Coverage Diff              @@
##              trunk    #7181      +/-   ##
============================================
- Coverage     49.84%   49.83%   -0.01%     
- Complexity    10678    10684       +6     
============================================
  Files           595      601       +6     
  Lines         45138    45160      +22     
  Branches        402      402              
============================================
+ Hits          22497    22504       +7     
- Misses        22314    22329      +15     
  Partials        327      327              

Files Changed	Coverage Δ
includes/internal/emails/class-email-generator.php	82.60% <0.00%> (ø)
...ails/generators/class-student-completes-lesson.php	100.00% <ø> (ø)
...submission/answer/models/class-answer-abstract.php	66.66% <ø> (ø)
...z-submission/grade/models/class-grade-abstract.php	92.30% <ø> (ø)
...-submission/grade/models/class-grade-interface.php	0.00% <0.00%> (ø)
...bmission/grade/models/class-tables-based-grade.php	0.00% <0.00%> (ø)
...ils/generators/class-email-generators-abstract.php	41.66% <33.33%> (ø)
...ubmission/answer/models/class-answer-interface.php	50.00% <50.00%> (ø)
...ission/answer/models/class-tables-based-answer.php	50.00% <50.00%> (ø)
...ission/grade/models/class-comments-based-grade.php	75.00% <75.00%> (ø)
... and 21 more

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[merkushin]

Thanks Miro! Works well!