test: enable BYOSA test for remote_function cloud function

[shobsi]

This support was added in PR#407 but the test was only verified locally since the project bigframes-load-testing is latchkey managed and would require some extra configuration to set-up. This change does one step better by enabling the test in the automated pipelines by targeting it to a different project bigframes-dev-perf which is easier to set up through cloud console. Eventually it should be moved to run entirely in bigframes-load-testing after the necessary configuration is done through latchkey (created internal issue 329339908 to track the work).

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Fixes #<issue_number_goes_here> 🦕