feat: add support for the new guardrails result payload #2800

Job	Run time
discover-testcases	5s
apicalls-testcase / alpha	54s
basic-testcase / alpha	30s
calculator-evals / cloud	2m 52s
apicalls-testcase / staging	49s
calculator-crash-evals / cloud	1m 47s
eval-spans-testcase / alpha	1m 42s
eval-input-overrides / alpha	30s
calculator-crash-evals / staging	1m 47s
basic-testcase / staging	30s
apicalls-testcase / cloud	51s
eval-input-overrides / cloud	34s
calculator-crash-evals / alpha	1m 34s
basic-testcase / cloud	35s
calculator-evals / staging	3m 0s
eval-input-overrides / staging	29s
langchain-cross / staging	45s
eval-spans-testcase / staging	1m 47s
eval-spans-testcase / cloud	1m 51s
eval-telemetry-testcase / staging	2m 18s
langchain-cross / cloud	46s
eval-telemetry-testcase / alpha	2m 16s
eval-telemetry-testcase / cloud	2m 25s
langchain-cross / alpha	44s
tools-evals / cloud	2m 12s
tools-evals / alpha	1m 57s
tools-evals / staging	2m 2s
calculator-evals / alpha	2m 42s
summarize-results	3s
	40m 17s

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