[tests-only] Fix file names used for SonarCloud code coverage in CI

[phil-davis]

Description

PR #40409 changed the PHP docker image to Ubuntu 20.04. A side-effect was that the drone CI naming of the coverage result files changed, and so coverage did not get correctly sent to SonarCloud.

The coverage result files are named based on the unit test pipeline names (that ensures that they have unique names). This PR puts the names back to just having php7.4 (rather than php7.4-ubuntu20.04). That will shorten the pipeline names, and also make the coverage result file names match what is in sonar-project.properties

I also removed some duplicates in sonar-project.properties

How Has This Been Tested?

CI

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information