Remove explicit package versions from project files

[bart-vmware]

Description

Replace all explicit package versions from project files with a version variable. The following versions were changed:

• [EXPOSED] RabbitMQ.Client: Bumped from 5.0.1 to 5.1.2 (5.1.2 was already used at some places)
• [NON-EXPOSED] Azure.Cosmos: Removed (was at 4.0.0-preview3), because the package has been unlisted on nuget.org
• [NON-EXPOSED] Microsoft.Azure.Cosmos: Bumped from 3.7.0 to 3.52.1
• [NON-EXPOSED] FluentAssertions.Json: Bumped from 5.5.0 to 6.1.0

Quality checklist

• Your code complies with our Coding Style.
• You've updated unit and/or integration tests for your change, where applicable.
• You've updated documentation for your change, where applicable.
  If your change affects other repositories, such as Documentation, Samples and/or MainSite, add linked PRs here.
• There's an open issue for the PR that you are making. If you'd like to propose a new feature or change, please open an issue to discuss the change or find an existing issue.
• You've added required license files and/or file headers (explaining where the code came from with proper attribution), where code is copied from StackOverflow, a blog, or OSS.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud