Improve Freebuff session limit messaging #6712

Job	Run time
build-and-check	2m 53s
test-integration-cli	54s
test-integration-web	47s
test-integration-packages/agent-runtime	44s
test-integration-packages/billing	1m 3s
test-integration-common	54s
test-packages/internal	51s
test-integration-packages/internal	1m 12s
test-.agents	48s
test-common	44s
test-packages/agent-runtime	52s
test-integration-sdk	3m 24s
test-cli	56s
test-packages/billing	55s
test-web	54s
test-sdk	44s
	18m 35s

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