[stable31] fix: Support sha-1 algo for user certificate signature

[artonge]

Manual backport of #893

[codecov]

Codecov Report

Attention: Patch coverage is 92.68293% with 3 lines in your changes missing coverage. Please review.

Project coverage is 38.28%. Comparing base (775aeda) to head (ca4e3d9).
Report is 5 commits behind head on stable31.

Files with missing lines	Patch %	Lines
src/services/webDavProxy.spec.ts	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           stable31     #895      +/-   ##
============================================
+ Coverage     37.72%   38.28%   +0.55%     
============================================
  Files            33       33              
  Lines          1450     1468      +18     
  Branches         76       79       +3     
============================================
+ Hits            547      562      +15     
- Misses          901      904       +3     
  Partials          2        2              

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