Show premium-session quota in freebuff session-ended banner #568

Job	Run time
build-freebuff	1m 12s
build-and-smoke-freebuff-windows	2m 33s
e2e-version	54s
e2e-slash-commands	1m 9s
e2e-help-command	1m 8s
e2e-agent-startup	2m 38s
e2e-code-edit	57s
e2e-terminal-command	1m 4s
e2e-ads-behavior	1m 4s
e2e-startup	1m 12s
	13m 51s

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