smf: update PATH for clustered clickhouse. (#9284)

We put the clickhouse binary in /opt/oxide/clickhouse for single-node
clickhouse, but in /opt/oxide/clickhouse_server for clustered
clickhouse. This patch adds the latter path to $PATH so that the
clickhouse binary is in the path for both single-node and clustered
clickhouse topologies.

@bnaecker, do you know if I made this change in the right place? Full
disclosure: I just looked around the codebase for lines that add
clickhouse binaries to PATH and guessed that this did the right thing.

Author: jmcarp

smf/profile/profile

@@ -13,7 +13,7 @@ case "$HOSTNAME" in
 	PATH+=:/opt/oxide/crucible/bin
 	;;
     oxz_clickhouse*)
-	PATH+=:/opt/oxide/clickhouse:/opt/oxide/clickhouse_keeper
+	PATH+=:/opt/oxide/clickhouse:/opt/oxide/clickhouse_server:/opt/oxide/clickhouse_keeper
 	;;
     oxz_external_dns*|oxz_internal_dns*)
 	PATH+=:/opt/oxide/dns-server/bin