core: improve storage mgmt

[dominic-r]

Closes AUTH-X
Closes QA-1
Closes #11939
Closes #13463
Closes #11964
Closes #12985
Closes #11176

Todo

• Default application icon if load error instead of "Application"
• Make all tests pass
• Test with brands
• Test with filesystem
• Fix UI Feedback on app creation err for media for example
• Get the right S3 presigned params (if it even matters)
• QA

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[codecov]

Codecov Report

Attention: Patch coverage is 14.99472% with 805 lines in your changes missing coverage. Please review.

Project coverage is 71.64%. Comparing base (a3f8611) to head (33a61f6).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
authentik/root/tests/test_storages.py	15.87%	392 Missing ⚠️
authentik/root/storages.py	13.17%	356 Missing ⚠️
authentik/core/tests/test_applications_api.py	20.58%	27 Missing ⚠️
authentik/lib/utils/file.py	15.38%	22 Missing ⚠️
authentik/core/models.py	0.00%	4 Missing ⚠️
authentik/core/api/applications.py	50.00%	2 Missing ⚠️
authentik/root/settings.py	33.33%	2 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (a3f8611) and HEAD (33a61f6). Click for more details.

HEAD has 6 uploads less than BASE

Flag	BASE (a3f8611)	HEAD (33a61f6)
unit	10	4

Additional details and impacted files

@@             Coverage Diff             @@
##             main   #13406       +/-   ##
===========================================
- Coverage   92.68%   71.64%   -21.04%     
===========================================
  Files         794      795        +1     
  Lines       40425    41296      +871     
===========================================
- Hits        37468    29588     -7880     
- Misses       2957    11708     +8751     

Flag	Coverage Δ
e2e	47.53% <1.45%> (-0.43%)	⬇️
integration	24.08% <1.45%> (-0.24%)	⬇️
unit	67.15% <14.99%> (-23.35%)	⬇️

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[dominic-r]

Ok, ive got a decent working version. Still some things to iron out, tho. I'll make this as ready for review to get a few suggestions/comments