Issue fix 5123

[Lyndon-Li]

Fix issue #5123, Kopia repository supports self-cert CA for S3 compatible storage.

[codecov-commenter]

Codecov Report

Merging #6268 (78db017) into main (ea4e49f) will decrease coverage by 0.04%.
The diff coverage is 30.76%.

@@            Coverage Diff             @@
##             main    #6268      +/-   ##
==========================================
- Coverage   41.20%   41.16%   -0.04%     
==========================================
  Files         252      252              
  Lines       23490    23503      +13     
==========================================
- Hits         9680     9676       -4     
- Misses      13052    13068      +16     
- Partials      758      759       +1     

Impacted Files	Coverage Δ
pkg/repository/udmrepo/kopialib/backend/s3.go	51.85% <0.00%> (-2.00%)	⬇️
pkg/repository/udmrepo/kopialib/backend/utils.go	57.44% <0.00%> (-11.79%)	⬇️
pkg/repository/provider/unified_repo.go	54.67% <100.00%> (+0.50%)	⬆️

... and 1 file with indirect coverage changes