Set runtime directory permissions

[madelen-at-work]

Describe your changes

For other ACAP applications (running as a dynamic user) to be able to access the IPC socket in /var/run/user//docker.sock the runtime directory (/var/run/user/) must have group permissions set to read and execute.

Issue ticket number and link

Fixes issue where a second ACAP application failed to use the cli:s due to insufficient permissions

Checklist before requesting a review

• I have performed a self-review of my own code
• I have verified that the code builds perfectly fine on my local system
• I have added tests that prove my fix is effective or that my feature works
• I have commented my code, particularly in hard-to-understand areas
• I have verified that my code follows the style already available in the repository
• I have made corresponding changes to the documentation