GitOps: Allow setting a new proxy in gitrepo

Bogdan Antoherequested to merge
ba/test-proxy into main

Add repo_proxy values in order to test the possibilty of setting a new proxy for gitrepositories in gitops workflow.

Set on capo only because in this case we are using proxies.

see: https://fluxcd.io/flux/components/source/gitrepositories/#proxy-secret-reference

Based on previous documentation, having a secret where a new proxy is set will take precedence over all the proxy environment variables.

.spec.proxySecretRef.name takes precedence over all environment variables

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