Improve Freebuff session limit messaging #6711

Job	Run time
build-and-check	3m 15s
test-integration-common	41s
test-integration-packages/agent-runtime	44s
test-integration-packages/internal	1m 4s
test-integration-packages/billing	1m 8s
test-integration-cli	44s
test-integration-sdk	4m 0s
test-integration-web	43s
test-common	42s
test-packages/internal	47s
test-packages/billing	44s
test-web	1m 4s
test-cli	57s
test-sdk	56s
test-.agents	41s
test-packages/agent-runtime	55s
	19m 5s

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