Fix GradioUI system prompt

[Akrog]

Description

On the GradioUI the system prompt displayed is always using the default system prompt, which is problematic when running the service with a custom system prompt (system_prompt_path) and allowing overriding it (enable_system_prompt_override: true).

With this simple patch we default to the configured system prompt on the GradioUI and only use the default system prompt if we don't have it configured.

Type of change

• Bug fix

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[openshift-ci]

@Akrog: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/e2e-ols-cluster	cd38b84	link	true	/test e2e-ols-cluster
ci/prow/integration	cd38b84	link	true	/test integration
ci/prow/security	cd38b84	link	false	/test security
ci/prow/verify	cd38b84	link	true	/test verify
ci/prow/unit	cd38b84	link	true	/test unit

Full PR test history. Your PR dashboard.

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