feat: allow changing port and skip TLS verfication

[eliobischof]

Locally testing TLS enabled zitadel instances using zitadel-go is hard. It only allows secure connections with port 443, however, listening on 443 often requires special OS privileges. Also, it doesn't allow skipping TLS verification, for example if zitadel uses a self-signed certificate.

Two options are added to pkg/zitadel/zitadel.go that resolve these issues:

• WithPort
• WithInsecureSkipVerifyTLS

These changes are needed to properly test a TLS enabled helm chart deployment using a self-signed cert zitadel/zitadel-charts#268

Definition of Ready

• I am happy with the code
• Short description of the feature/issue is added in the pr description
• PR is linked to the corresponding user story
• Acceptance criteria are met
• All open todos and follow ups are defined in a new ticket and justified
• Deviations from the acceptance criteria and design are agreed with the PO and documented.
• No debug or dead code
• My code has no repetitions
• Critical parts are tested automatically
• Where possible E2E tests are implemented
• Documentation/examples are up-to-date
• All non-functional requirements are met
• Functionality of the acceptance criteria is checked manually on the dev system.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 0.05%. Comparing base (1214ed0) to head (eec761e).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/zitadel/zitadel.go	0.00%	14 Missing ⚠️
pkg/client/credentials.go	0.00%	11 Missing ⚠️
pkg/client/client.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #399      +/-   ##
==========================================
- Coverage    0.05%    0.05%   -0.01%     
==========================================
  Files         127      127              
  Lines      105376   105395      +19     
==========================================
  Hits           57       57              
- Misses     105316   105335      +19     
  Partials        3        3              

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[github-actions]

🎉 This PR is included in version 3.3.0 🎉

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