Fix banned user test to match new suspension message (#520) #6151

Job	Run time
build-and-check	2m 55s
test-integration-packages/billing	1m 20s
test-integration-packages/internal	1m 11s
test-integration-common	44s
test-integration-sdk	1m 19s
test-integration-cli	50s
test-integration-packages/agent-runtime	51s
test-integration-web	51s
test-packages/agent-runtime	51s
test-common	46s
test-packages/billing	46s
test-cli	48s
test-.agents	38s
test-sdk	42s
test-web	58s
test-packages/internal	47s
	16m 17s

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