Move SubadminMiddleware to user_management app

[DeepDiver1975]

Description

The sub admin middleware is only used in the user management frontend.
Moving it there ....

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[phil-davis]

works fine using this branch in core and the user_management PR owncloud-archive/user_management#16 bugfix/no-access-to-unpriviledged-users branch as a pair together.

[codecov]

Codecov Report

Merging #30960 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master   #30960      +/-   ##
============================================
- Coverage      62.3%   62.29%   -0.01%     
+ Complexity    18233    18224       -9     
============================================
  Files          1141     1140       -1     
  Lines         68155    68129      -26     
  Branches       1232     1232              
============================================
- Hits          42461    42439      -22     
+ Misses        25333    25329       -4     
  Partials        361      361

Flag	Coverage Δ	Complexity Δ
#javascript	52.04% <ø> (ø)	0 <ø> (ø)	⬇️
#phpunit	63.46% <ø> (-0.01%)	18224 <ø> (-9)

Impacted Files	Coverage Δ	Complexity Δ
settings/Application.php	53.59% <ø> (+0.46%)	33 <0> (-1)	⬇️

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[DeepDiver1975]

works fine using this branch in core and the user_management PR owncloud-archive/user_management#16 bugfix/no-access-to-unpriviledged-users branch as a pair together.

taking as 👍

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.