fix Role Permissions of Method UnregisterApplication & Add Parameter to CertificateStoreIdentifier OpenStore Method

[romanett]

Proposed changes

Fix allowed Roles of Method Unregister Application allow Application Self Admin Privilge:
https://reference.opcfoundation.org/GDS/v105/docs/6.6.8

Add Parameter NoPrivateKeys to OpenStoreMethod of CertificateStoreIdentifier

Related Issues

• Fixes #

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• 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

• I have read the CONTRIBUTING doc.
• 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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 53.53%. Comparing base (3f29a72) to head (5865efa).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2558      +/-   ##
==========================================
- Coverage   54.55%   53.53%   -1.02%     
==========================================
  Files         335      335              
  Lines       64749    64750       +1     
  Branches    13292    13292              
==========================================
- Hits        35325    34666     -659     
- Misses      25594    26271     +677     
+ Partials     3830     3813      -17     

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