Reenable fireworks provider #5919

Job	Run time
build-and-check	3m 2s
test-integration-packages/internal	1m 32s
test-integration-sdk	1m 41s
test-integration-packages/agent-runtime	1m 10s
test-integration-web	58s
test-cli	1m 23s
test-integration-cli	45s
test-integration-common	55s
test-packages/internal	1m 12s
test-common	43s
test-.agents	1m 8s
test-web	49s
test-packages/billing	51s
test-sdk	1m 2s
test-packages/agent-runtime	1m 7s
test-integration-packages/billing	1m 4s
	19m 22s

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