[GDS] Add Method GetCertificates to GDS for Pull Support and ServerConfiguration for Push Support / Fix CheckRevocationStatus

[romanett]

Proposed changes

Adding the Method GetCertificates for Pull Model to the GDS: https://reference.opcfoundation.org/GDS/v105/docs/7.9.8

And also to the Server for Push Support:

https://reference.opcfoundation.org/GDS/v105/docs/7.10.5

Additionally the GDS Client & Push client are updated with the new Method

Fix checkRevocationStatus Method to do an online Revocation check.

Related Issues

• Fixes #2469

Types of changes

• [ ] Bugfix (non-breaking change which fixes an issue)
• [x] Enhancement (non-breaking change which adds functionality)
• [ ] Test enhancement (non-breaking change to increase test coverage)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected, requires version increase of Nuget packages)
• [ ] Documentation Update (if none of the other choices apply)

Checklist

• [x] I have read the CONTRIBUTING doc.
• [x] I have signed the CLA.
• [ ] I ran tests locally with my changes, all passed.
• [ ] I fixed all failing tests in the CI pipelines.
• [ ] I fixed all introduced issues with CodeQL and LGTM.
• [ ] I have added tests that prove my fix is effective or that my feature works and increased code coverage.
• [ ] I have added necessary documentation (if appropriate).
• [ ] Any dependent changes have been merged and published in downstream modules.

Further comments

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 62.76596% with 35 lines in your changes are missing coverage. Please review.

Project coverage is 54.63%. Comparing base (a6f44c7) to head (2dcfd1c).

Files	Patch %	Lines
...pc.Ua.Gds.Server.Common/ApplicationsNodeManager.cs	44.00%	23 Missing and 5 partials :warning:
...a.Server/Configuration/ConfigurationNodeManager.cs	78.57%	2 Missing and 1 partial :warning:
...a.Gds.Client.Common/GlobalDiscoveryServerClient.cs	84.61%	1 Missing and 1 partial :warning:
...Gds.Client.Common/ServerPushConfigurationClient.cs	88.23%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2553 +/- ## ========================================== - Coverage 54.64% 54.63% -0.02% ========================================== Files 342 342 Lines 65056 65140 +84 Branches 13335 13349 +14 ========================================== + Hits 35550 35587 +37 - Misses 25641 25677 +36 - Partials 3865 3876 +11 ```

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