update fireworks to use kimi k2.5 #6073

Job	Run time
build-and-check	3m 13s
test-integration-packages/internal	1m 10s
test-integration-packages/billing	1m 10s
test-integration-web	45s
test-integration-common	44s
test-integration-sdk	1m 25s
test-packages/internal	50s
test-cli	1m 1s
test-packages/billing	41s
test-integration-cli	40s
test-common	38s
test-sdk	45s
test-packages/agent-runtime	55s
test-integration-packages/agent-runtime	47s
test-.agents	39s
test-web	51s
	16m 14s

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