Https subscription and root certs

[ablepharus]

Implement https subscriptions and fix a bug related to our handling regarding the https client.

Https subscriptions were just not handled, initialise a client and reuse the existing code for http subscriptions.
There was a bug in our certificate store handling. The SSLClient owns its certificate store and deletes it on destruction.
We can not share one store with all clients, so every client gets its own now.

[codecov]

Codecov Report

Attention: Patch coverage is 17.77778% with 37 lines in your changes are missing coverage. Please review.

Project coverage is 57.03%. Comparing base (a7a7c5c) to head (2bd9294).

Files	Patch %	Lines
src/client/include/RestClientNative.hpp	21.62%	5 Missing and 24 partials ⚠️
...c/client/include/RestDefaultClientCertificates.hpp	0.00%	7 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #341      +/-   ##
==========================================
- Coverage   57.15%   57.03%   -0.13%     
==========================================
  Files          69       69              
  Lines        7310     7324      +14     
  Branches     2703     2710       +7     
==========================================
- Hits         4178     4177       -1     
- Misses       1322     1324       +2     
- Partials     1810     1823      +13     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[wirew0rm]

Looks good in general.
I think it would be good to persist the findings about how the certstore is handled. Please update the PR description and commit messages accordingly.

Also this adds quite some new uncovered new code paths which I think should be easy to fix, since RestClient_tests.cpp already has http(s) tests for get/set and a http only test for subscribe.

[sonarqubecloud]

Quality Gate failed

Failed conditions
22.4% Coverage on New Code (required ≥ 80%)
51.0% Duplication on New Code (required ≤ 3%)

See analysis details on SonarCloud

[wirew0rm]

Looks good, thanks for the additional documentation.

I've looked into the coverage, it seems most of it is due to coverage not being properly configured in this project, the majority of the missed lines is in the unit-test that seems to be excluded from coverage collection but not coverage calculation :/