feat: add support for the new guardrails result payload #2808

Job	Run time
discover-testcases	4s
basic-testcase / alpha	30s
apicalls-testcase / cloud	55s
apicalls-testcase / alpha	51s
basic-testcase / staging	32s
calculator-evals / staging	2m 59s
calculator-evals / cloud	2m 49s
basic-testcase / cloud	30s
eval-input-overrides / alpha	33s
calculator-crash-evals / staging	1m 44s
eval-spans-testcase / alpha	1m 45s
eval-input-overrides / cloud	29s
calculator-crash-evals / alpha	1m 55s
calculator-crash-evals / cloud	1m 48s
calculator-evals / alpha	2m 46s
apicalls-testcase / staging	54s
tools-evals / alpha	2m 2s
langchain-cross / alpha	41s
langchain-cross / cloud	45s
eval-telemetry-testcase / staging	2m 23s
langchain-cross / staging	47s
tools-evals / staging	2m 9s
eval-telemetry-testcase / alpha	2m 18s
eval-telemetry-testcase / cloud	2m 22s
eval-spans-testcase / cloud	1m 51s
eval-spans-testcase / staging	1m 48s
tools-evals / cloud	2m 3s
eval-input-overrides / staging	30s
summarize-results	2s
	40m 45s

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