fix: multiple fixes to CI workflows

[clmcgrath]

This pull request introduces several improvements and refinements to the CI/CD pipeline, focusing on test result reporting, artifact management, and configuration flexibility. The changes enhance how test results are named and aggregated, improve artifact upload logic, and update versioning configuration for better branch handling.

CI/CD Pipeline Improvements

• Added a new workflow file ci-test.yml for building and running unit tests on multiple platforms, including steps for test result publishing, coverage reporting, and NuGet package handling.
• Updated the main CI workflow (ci.yml) to support custom test results filenames, improved artifact upload logic, and added steps to aggregate and publish test results across platforms. [1] [2]
• Updated the release workflow (release.yml) to use the new test results filename and directory options for consistent artifact naming and uploads.

Test Results and Artifact Handling

• Enhanced the build-and-test and publish-test-results GitHub actions to accept custom test results filenames and directories, improving flexibility and artifact management. [1] [2] [3] [4]
• Adjusted annotation limits and artifact upload paths for more efficient reporting and storage.

Versioning Configuration

• Updated GitVersion.yml to improve branch regex matching for the dev branch and ensure proper source branch tracking for hotfixes, supporting more robust versioning workflows. [1] [2]