Internals: Reuse http.Client

[justinsb]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature or resource

@aojea pointed out that we should be reusing the http.Client , to pick up the fixes in kubernetes-sigs/controller-runtime#2122 and kubernetes/kubernetes#105490 .

It's not 100% clear (to me) whether we're using a custom transport, but either way it's more efficient - just in some cases it's much more efficient!

Likely will require a controller-runtime update, as I think we're on an older version.

Additional information

No response

Importance

No response