add SonarQube 26.7 to CI job

[JuditKnoll]

SonarQube community 26.7 got released (see https://github.com/SonarSource/sonarqube/releases/tag/26.7.0.124771). This PR adds it to the CI job run to verify it works.
The relevant CI runs successfully on my fork (see the run), only those (sonarcloud and successfully-finished jobs) failed which require resources only available in upstream.

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This change is 

[guwirth]

Hello @JuditKnoll,

thanks for providing this. Build and test are working. Point is that we focus on LTA only, latest is SonarQube 2026.1.3 LTA. We don’t like to merge this.

Regards

[JuditKnoll]

Hello @JuditKnoll,

thanks for providing this. Build and test are working. Point is that we focus on LTA only, latest is SonarQube 2026.1.3 LTA. We don’t like to merge this.

Regards

Hello @guwirth,

Sounds reasonable. (For the community edition there is no LTA anymore, only the latest release.)
Thanks for letting me know.

[guwirth]

Hello @JuditKnoll,

For the community edition there is no LTA anymore

The strategy here is to support the community edition which is using the same API version as the last LTA.
https://github.com/SonarSource/sonar-plugin-api?tab=readme-ov-file#sonarqube-server

As you can see

2026.1.3.123084	13.4.3.4290

26.1.0.118079	13.4.3.4290

As a rule, however, newer versions of SQ are also supported; we simply do not test them, as this would take up too much CI/CD time and budget.

Regards,