ci: add set git config to resolve when ansible-galaxy-requirements has private repository

[h-ohta]

Description

When ansible-galaxy-requirements.yaml has private repository, we fail to install in github actions because we don't have tokens. So, I add set git config.

Related links

https://github.com/tier4/pilot-auto/pull/768

Tests performed

pass pre-commit-ansible and setup-universe

Notes for reviewers

Interface changes

Effects on system behavior

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