Fix deprecation warnings on infrastructure_root_manager GitHub Actions

[cpswan]

Is your feature request related to a problem? Please describe.

Actions runs such as https://github.com/atsign-company/infrastructure_root_manager/actions/runs/3466873608 are showing deprecation warnings like:

Describe the solution you'd like

Modify workflows to make use of supported methods e.g. using using google-github-actions/auth