feat(install): add retry logic with exponential backoff for ansible-galaxy

[rebtoor]

• Enhance retry_with_timeout to support retry delays and exponential backoff via RETRY_DELAY and EXPONENTIAL_BACKOFF environment variables.
• Add retries to ansible-galaxy role and collection installations to handle transient network errors like HTTP 502.
• Check requirements.yml existence before proceeding with installation.

[openshift-ci]

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[openshift-ci]

Hi @rebtoor. Thanks for your PR.

I'm waiting for a github.com member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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